Proportions

Fun Song on Ratios and Proportions to start the lesson. Watch and Laugh!! PROPORTIONS ~ by the Math Antics Guy Watch the video.Fill in the blanks.Solve some problems. A proportion is a pair of equivalent ratios. Equivalent means equal to, or the same as. One way to write proportions is to see if we can 1) identify the relationship within the fraction 2) identify the relationship between the fractions across the equal sign.IF the relationship is not easy to see, we can 3) cross multiply to achieve this. In a proportion, we use what we know to find what we don't know. Proportions are important because they can help us solve all kinds of real world problems. Which way (Cross Multiplying or Scale Factor) do you prefer to solve proportions? n = 2 n = 3 n = 6 n = 18 27 2 = n n = 10 n = 5 n = 9 n = 2 12 = 30 n = 1 n = 3 n = 72 n = 2 7 = 21 n = 6 n = 18 n = 9 n = 1 Solve the following proportions and match each proportion to the correct answer. n = 12 n = 8 5 = 2 n = 20 5 = n n = 1 7 = 3 n = 15 2 = 9 n = 10 Fill in the chart to extend the ratio. DO NOT enter a dollar sign. Number of movie tickets 1 10 17 Price (in dollars) 5.75 57.50 97.75 Fill in the chart to extend the ratio. Number of buses 1 6 14 Number of students 52 312 728 Brennan used 30 centimeters of tape to wrap 6 presents. If he uses the same amount of tape for each present, how much tape will Brennan need to wrap 9 presents? 33 cm 45 cm 15 cm 1.8 cm Kurt prepared 20 kilograms of dough after working 5 hours. If he prepares the same amount each hour, how much dough will Kurt prepare in 10 hours? 20 kg 2.5 kg 40 kg 10 kg Jess learned a total of 20 appetizer recipes over the course of 4 weeks of culinary school. If she learns the same number of recipes each week, after 5 weeks of culinary school, how many appetizer recipes will Jess know? 1 recipe 25 recipes 21 recipes 16 recipes 38 pounds of tomatoes cost $182.40. How many pounds of tomatoes can you get for $144? 691.2 pounds 35 pounds 30 pounds 31.5 pounds