M5X Module 11-Law of Proportion

Which equation shows that a:b and c:d are proportional?

• a×b = c×d

• a×c = b×d     

•  a÷c =d÷b

• a×d = b×c

In the proportion 5:x = 15: 48, what is the product of the means?  

• 5x

• 220

• 15x

• 720

In the proportion b:14 = 27: 42, what is the product of the extremes? 

• 27b    

• 42b    

• 378

• 1,134

• 15b

• an

• ab

• 15a

• 25p

• 25q

• 150

• 6q

• d & e

• c & f

• c & e

• d & f

Find the value of p in the proportion 7: p = 49 :112.       

• 16       

• 49

• 7

• 14

• y=35

• y=45

• y=48

• y=50