Set-up a proportion in dollars/mix : Trevor bought 5 packages of cake mix for $30. How much would 8 packages of cake mix cost?, 5/30 = x/8, 5/30 = 8/x, 30/5 = x/8, 30/8 = 5/x, Set-up a proportion in dollars/gallon : You paid $28 for 8 gallons of gas. How much would you pay for 15 gallons of gas?, 8/15 = 28/x, 28/8 = x/15, 28/8 = 15/x, 8/28 = x/15, Set-up a proportion in laps/minutes : Inessa ran 4 laps in 10 minutes. How long with it take her to run 5 laps at this pace?, 4/10 = 5/x, 4/10 = x/5, 10/4 = 5/x, 5/4 = 10/x, Set-up a proportion in miles/hour : A truck travels 93 miles in 1.5 hours. At this rate, how far will it travel is 4 hours?, 1.5/95 = x/4, 93/1.5 = 4/x, 1.5/4 = x/95, 93/1.5 = x/4, Set-up a proportion in small/large : The triangles use a scale of 2 : 5. What is the value of x on the larger triangle?, 2/5 = x/8, 2/5 = 8/x, 5/2 = 8/x, 5/8 = 2/x, The ratio of boys to girls is 3 to 2. If there are 12 boys, how many girls are there? Set up the proportion., 2/3 = 12/x, 2/12 = 3/x, 3/2 = 12/x, 3/2 = x/12, At a recent party, it cost $9.50 for refreshments for 10 guests. At this rate, how much would it cost to have refreshments for 80 guests?, $9.50/10 = x/80, $9.50/80 = x/10, Jack was planting a tree. He was to dig a hole that was 3 feet deep for every 5 feet of tree height. How deep should he dig the hole for a tree that is 17 feet high?, 5/3 = x/17, 3/5 = x/17, A recipe calls for 2 ½ cups of flour to make 2 dozen cookies. How many cups of flour would be required to bake 15 dozen cookies?, 2.5/15 = 2/x, 2.5/2 = x/15, the ratio of mammals to reptiles in the zoo. What does this fraction look like?, 12/5, 5/12.

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