Number Hunt

This worksheet takes the same proportion skill and presents it as a missing-number hunt. Instead of always using the letter x, each problem leaves one part of the proportion blank and asks students to determine which number makes the two ratios equivalent. Problems include forms such as 3/4 = /20, 5/ = 15/21, /18 = 4/6, and 8/ = 12/18. Students use cross products to find the missing value and then write that number on the answer line.

For a parent, the easiest way to think about this worksheet is: one number is missing from an equal-ratio relationship. Cross multiplication helps uncover it. For example, if 3/4 = __/20, multiply 3 × 20 to get 60, then divide by 4. The missing number is 15. Students are really solving for an unknown just like they would with x, but the blank format can feel a little less intimidating.

Key Learning Objectives

• Find Missing Values in Ratios: Students determine the number that makes each proportion true.
• Use Cross Products to Solve: Learners turn the proportion into a multiplication equation.
• Work with Different Blank Positions: The missing number may appear in a numerator or denominator.
• Strengthen Equivalent-Ratio Understanding: Students see that both fractions must represent the same relationship.
• Check Solutions: Learners can cross multiply again to verify the completed proportion.

Parent-Friendly Explanation

Use this routine:

1. Cross multiply the known diagonal.
2. Write the multiplication involving the missing number.
3. Divide to find the blank.
4. Check by cross multiplying both diagonals.

For example:

3/4 = __/20

3 × 20 = 60

60 ÷ 4 = 15

So the missing number is 15.

Why This Worksheet Helps

• Makes Unknowns Less Intimidating: A blank can be easier for some students than a variable.
• Builds Proportion Sense: Students see that equivalent ratios must stay balanced.
• Strengthens Division Skills: After cross multiplying, division is usually needed to find the missing value.
• Prepares for Algebra: The blank is essentially acting like a variable.
• Provides Repeated Practice: Different positions help students avoid relying on one memorized format.

Classroom & Home Use

• Great for Independent Practice: The blank format is direct and easy to follow.
• Helpful for Parents: Adults can ask, “What number would make these ratios match?”
• Useful for Intervention: Students who are nervous about x can practice the same skill in a simpler-looking form.
• Good for Review: The worksheet reinforces the full cross-multiplication process.
• Strong for Homeschooling: Families can make additional missing-number proportions very easily.

The real value of this worksheet is that it helps students understand that proportions are like balanced relationships. If one number is missing, the other three numbers give enough information to find it. For parents, the best coaching question is: “What number makes both cross products equal?” In classroom and homeschool settings, this activity strengthens both proportion fluency and early algebra thinking.