From the question, we are told that to make shade of paint, we need the following parameters
Mix 4 quarts of green paints with 2/3 cups of black paint
To produce a Jasper Green paint
We need 4quarts of green paints and 2/3 cups of black paint mixed together
4 quarts will require 2/3 cup of black paints
x quarts will require 4 cups of black paints
Mathematically,
4 ======== 2/3
x ======== 4
Introduce cross- multiplication
4 * 4 = x * 2/3
16 = 2x/3
cross multiply
16 * 3 = 2x
48 = 2x
Divide both sides by 2
48/2 = 2x/2
x = 48/2
x = 24
4 cups of black paints will require 24 quarts of green paints
The answer is 24 quarts of green paint