A recipe calls for 4 cups of flour to make a dozen cookies. How many cups of flour would be needed for 54 cookies?

4/12 = x/54

Cross multiply and solve for x.

To find out how many cups of flour would be needed for 54 cookies, we can set up a proportion using the information given.

We know that 4 cups of flour are needed to make a dozen cookies. So, the ratio of cups of flour to the number of cookies is 4:12. We can simplify this ratio to 1:3 by dividing both sides by 4.

Now, we can set up the proportion:

1 cup of flour / 3 cookies = x cups of flour / 54 cookies

To solve for x, we can cross-multiply and then divide:

3 * x = 1 * 54

3x = 54

Dividing both sides by 3:

x = 54 / 3

x = 18

Therefore, you would need 18 cups of flour to make 54 cookies.