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Lesson 38 Ratio Problems. We can solve proportions that contain an unknown by setting the cross products equal and then dividing to complete the solution. When we set the cross products equal, we say that we are cross multiplying. Solve: . Lesson 38 cont.
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Lesson 38 Ratio Problems We can solve proportions that contain an unknown by setting the cross products equal and then dividing to complete the solution. When we set the cross products equal, we say that we are cross multiplying. Solve:
Lesson 38 cont. 2. The ratio of pigs to goats in the barnyard was 7 to 5. If there were 91 pigs, how many goats were there? 3. In the same barnyard the ratio of chickens to ducks was 9 to 4, and there were 108 chickens. How many ducks were there?