Question

Determine the missing term to make these ratios equal:
13:7 = 39:x

Answer 1

Answer: x = 21

Explanation:

13/39 = 7/x

13/39 = 1/3 (divide each side by 13)

1/3=7/x

1/3=7/21 (multiply the numerator by 3 to get the denominator)