# Find the missing number of 3:9 = N:12

2
by rambojudith

2014-10-04T09:41:03+08:00

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3:9 = n:12
3(n)=9(12)            # 9X12=108
3(n)=108
108/3                   #108 divided by 3
=36                      # the final answer is 36

the missing number is 36 so 3:9 = 36:12

check:    3(36) = 9 (12)
108=108    #they are thesame

hope its help..........
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2014-10-04T09:55:40+08:00

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Certified answers contain reliable, trustworthy information vouched for by a hand-picked team of experts. Brainly has millions of high quality answers, all of them carefully moderated by our most trusted community members, but certified answers are the finest of the finest.
Its a ratio and proportion
this symbol ":" represent "is to"
if 3:9 = 4:12
if 3 is to 9 then 4 is to 12

prove
3/9 = 0.33
4/12= 0.33

:)