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Variations of Ratio Model

(a) The total value of one of the items is given.

E.g. The ratio of the number of apples to oranges John had is 3:8. If there are 15 apples, how many oranges are there?

E.g. The ratio of the number of apples to oranges John had is 3:8. If there are 40 oranges, how many apples are there?

(b) The difference in value between the 2 items is given.

E.g. The ratio of the number of apples to oranges John had is 3:8. If there are 25 more oranges than apples, how many apples are there?

E.g. The ratio of the number of apples to oranges John had is 3:8. If there are 55 fruits altogether, how many apples are there?

(d) More than 2 items involved.

E.g. The ratio of the number of apples to oranges to pears John had is 3:8:4. If there are 75 fruits altogether, how many apples are there?

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