Set 3: Ratios Rates Proportions (Beginner)

**Choice D is the best answer.** Cross multiply: 3x = 6 times 12 = 72. x = 24

Explanation

Answer: D

PROBLEM

Solve: 3/6 = 12/x. Find x.

✓ Correct

Detailed Explanation

Choice D is the best answer. Cross multiply: 3x = 6 times 12 = 72. x = 24

Why others are wrong:

A: 48 is incorrect because it does not satisfy the equation.

B: 21 is incorrect because it does not satisfy the equation.

C: 12 is incorrect because it does not satisfy the equation.