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1

Set 5: Ratios Rates Proportions (Intermediate)

Explanation

Answer: A

PROBLEM

Solve: 3/5 = 9/x. Find x.

Solve: 3/5 = 9/x. Find x.

A.

15

✓ Correct
B.

12

C.

7

D.

17

Detailed Explanation

Choice A is the best answer. Cross multiply: 3x = 5 times 9 = 45. x = 15

Why others are wrong:
B: 12 is incorrect because it does not satisfy the equation.
C: 7 is incorrect because it does not satisfy the equation.
D: 17 is incorrect because it does not satisfy the equation.
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