Set 4: Ratios Rates Proportions (Intermediate)

**Choice B is the best answer.** Cross multiply: 6x = 7 times 18 = 126. x = 21

Explanation

Answer: B

PROBLEM

Solve: 6/7 = 18/x. Find x.

✓ Correct

Detailed Explanation

Choice B is the best answer. Cross multiply: 6x = 7 times 18 = 126. x = 21

Why others are wrong:

A: 18 is incorrect because it does not satisfy the equation.

C: 22 is incorrect because it does not satisfy the equation.

D: 19 is incorrect because it does not satisfy the equation.