Question

An oatmeal cookie recipe calls for 1 1/3 cups of oatmeal for every 4 1/2 cups of flour. Could you increase the recipe proportionately by using 6 cups of oatmeal and 9 cups of flour?

Answer 1

The recipe calls for 4/3 cups of oatmeal and 9/2 cups of flour.

If we convert them to a common denominator, we have 8/6 cups of oatmeal and 27/6 cups of flour, so, the ratio is 8:27.

If you use 6 cups of oatmeal and 9 cups of flour, the ratio will become 2:3 and will no longer be proportional.

TL;DR: No.

I Hope this helped.