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1) Given the proportion a/b = 11/20 , what ratio completes the equivalent proportion a/11 = ? (The answer needs to be a fraction)

 

 

2) A model is made of a car. The car is 3 meters long and the model is 4 centimeters long. What is the ratio of the length of the car to the length of the model?

RainbowPanda  Mar 5, 2018
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 #1
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1) Given the proportion a/b = 11/20 , what ratio completes the equivalent proportion a/11 = ? (The answer needs to be a fraction)

 

Notice something, RP

 

If

5/10   =  1/2        then it is also true that  the ratio of the numerators to the ratio of the denominators is the same....that is :

 

5/1  =  10/2

 

This implies   that

 

a /b   =  11/20      means that

 

a / 11  =  b / 20

 

Do you see this??

 

2) A model is made of a car. The car is 3 meters long and the model is 4 centimeters long. What is the ratio of the length of the car to the length of the model?

 

Equate units in terms of centimeters

 

3 m  =   300  cm

 

Ratio  :   actual length  / model length   =    300 cm / 4 cm   =   75 / 1   =  75 : 1

 

 

cool cool cool

CPhill  Mar 5, 2018
 #2
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Thank you so much for all of your help, I really appreciate it!

RainbowPanda  Mar 5, 2018

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