Question

The ratios in an equivalent ratio table are 3:12,4.16 and 5.20. If the number in the ratio is 10 what is the second number justify your reasoning

Answer 1

Answer: The second number is 40.

Explanation:

Let x be the second number. We can create another ratio and cross-multiply since this is an equivalent ratio table.

Given:

`\displaystyle (3)/(12) =(10)/(x)`

Cross-multiply:

3 * x = 12 * 10

3x = 120

Divide both sides of the equation by 3:

x = 40