Using Ratios to Solve Application Problems
Ellie has a collection of robots. For every 5\displaystyle {5} robots she made herself, she bought 4\displaystyle {4} at the store.

If Ellie made 30\displaystyle {30} robots, how many robots did she buy?

Ellie bought robots\displaystyle \text{robots}
Kory is having a pool party. She wants to buy 3\displaystyle {3} gallons of water for every 4\displaystyle {4} guests.

If Kory invites 20\displaystyle {20} guests, how many gallons of water should she buy?

Kory should buy gallons of water\displaystyle \text{gallons of water}
Kate made her friend cookies for her birthday. For every 13\displaystyle {13} cookies Kate made 8\displaystyle {8} were chocolate chip cookies.

If Kate made 52\displaystyle {52} cookies in total, how many cookies were chocolate chip?

Kate made her friend chocolate chip cookies\displaystyle \text{chocolate chip cookies}
Meg loves to read. Her favorite author is Dr. Seuss. For every 9\displaystyle {9} books Meg owns 5\displaystyle {5} are Dr. Seuss books.

If Meg has 20\displaystyle {20} Dr. Seuss books, how many books does she have in total?

Meg owns books in total\displaystyle \text{books in total}

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