PROPORTIONS (FROM RATIOS)

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. Determine if the pair of ratios are proportional or not proportional. Proportional 2 and 12 54 and 9 6 and 24 Not Proportional 11 and 33 2 and 8 7 and 15 n = 2 n = 3 n = 6 n = 18 27 2 = n n = 10 n = 5 n = 9 n = 2 6 = 30 n = 5 n = 6 n = 25 n = 1 7 = 21 n = 6 n = 18 n = 9 n = 1 To determine the following proportions, it is easier if you first reduce the known ratio (fraction), then use mental math to find the missing piece. n = 12 n = 8 5 = 2 n = 20 5 = n n = 1 7 = 3 n = 15 2 = 9 n = 10