• which ratio forms a proportion with 9/4

Answer 1

To determine which ratio forms a proportion with 9/4, we need another ratio that is equal to it.

Let's represent the unknown ratio as a/b.

For two ratios to form a proportion, it means that their cross products are equal.

The cross product of 9/4 and a/b is (9/4) = (a/b)

To simplify this equation, we can cross multiply:

9b = 4a

Thus, any ratio where the numerator and denominator are in this proportion will form a proportion with 9/4, as long as the cross product is equal. Examples include:

18/8, 27/12, 36/16, 45/20, etc.