How do I find the missing number in the following proportion? ___: 8 = 12:32

2 Answers
Nov 20, 2017

Answer:

The missing number is #3#.

Explanation:

Think like this:

#x/8 = 12/32#

Cross multiply

#32x = 96#

Divide both sides by #32# to get

#x = 3#

Nov 20, 2017

Answer:

See a solution process below:

Explanation:

We can call the number we are looking for #n#

We can now rewrite this problem as:

#n/8 = 12/32#

We can multiply each side of the equation by #color(red)(8)# to solve for #n# while keeping the equation balanced:

#color(red)(8) xx n/8 = color(red)(8) xx 12/32#

#cancel(color(red)(8)) xx n/color(red)(cancel(color(black)(8))) = cancel(color(red)(8)) xx 12/(color(red)(cancel(color(black)(32)))4)#

#n = 12/4#

#n = 3#