Question

Which pair of ratios do not form a true proportion? Circle all that apply.​

Answer 1

Answer: In problems involving proportions, we can use cross products to test whether two ratios are equal and form a proportion. To find the cross products of a proportion, we multiply the outer terms, called the extremes, and the middle terms, called the means.

Step-by-step explanation:

Answer 2

Rewrite each ratio as a fraction and reduce. If the reduced fractions are euqal, it is a proportion.

A. 20/5 = 4; 4/2 = 2; not a proportion

B. 3/4 = 3/4; 12/16 = 3/4; proportion

C. 18/8 = 9/4; 3/2 = 3/2; not a proportion

D. 12/24 = 1/2; 3/4 = 3/4; not a proportion

E. 6/9 = 2/3; 3/2 = 3/2; not a proportion

F. 8/6 = 4/3; 4/3 = 4/3; proportion