Final answer:
To maintain the proportion of ingredients in her pancake recipe, Ellie should use 1.2 cups of flour with her 1 cup of milk. A proportion is set up using the original amounts and solved to determine the new amount of flour needed.
Step-by-step explanation:
To figure out how much flour Ellie should use with 1 cup of milk instead of 1 1/4 cups, we set up a proportion because the ingredients must be scaled down equally to maintain the correct consistency and flavor of the pancakes. We start with the original ratio of flour to milk, which is 1 1/2 cups of flour to 1 1/4 cups of milk.
Set up the proportion as follows:
Original amount of milk: 1 1/4 cups
Original amount of flour: 1 1/2 cups
New amount of milk: 1 cup
New amount of flour: x cups
Create the equation using the cross-multiplication method:
(1 1/2) / (1 1/4) = x / 1
After solving this equation, you'll find:
(1.5) / (1.25) = x
Now x = (1.5) * (4/5)
x = 1.2 cups of flour
Therefore, Ellie should use 1.2 cups of flour with 1 cup of milk to keep the pancake batter proportions consistent.