To make pancakes, you need 2 cups of water for every 3 cups of flour. Write an equivalent ratio to find how much water you will need with 9 cups of flour.

2/3 = x/9

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To find an equivalent ratio, we can set up a proportion using the given ratios.

The given ratio is: 2 cups of water for every 3 cups of flour.

Let's set up the proportion:
2 cups of water / 3 cups of flour = x cups of water / 9 cups of flour.

To solve for x, we can cross-multiply and then solve for x.
(2 cups of water) * (9 cups of flour) = (3 cups of flour) * (x cups of water)

18 cups of water = 3 cups of flour * x cups of water.

To isolate x, we divide both sides of the equation by 3 cups of flour:
18 cups of water / 3 cups of flour = x cups of water.

Simplifying the fraction will give us:
6 cups of water = x cups of water.

Therefore, you will need 6 cups of water with 9 cups of flour to make pancakes.