SOLUTION: HELLO MY SON HAS A QUESTION ABOUT SOLVING THIS PROPORTION USING MENTAL MATH. 18 OVER 32=M OVER 36. HOW DO WE FIGURE THIS OUT AND CAN YOU TELL US HOW YOU CAME UP WITH THE ANSWER SO

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Question 62321This question is from textbook MATHEMATICS
: HELLO MY SON HAS A QUESTION ABOUT SOLVING THIS PROPORTION USING MENTAL MATH. 18 OVER 32=M OVER 36. HOW DO WE FIGURE THIS OUT AND CAN YOU TELL US HOW YOU CAME UP WITH THE ANSWER SO THAT WE ARE ABLE TO DO HIS OTHER PROPORTIONS? This question is from textbook MATHEMATICS

Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
18/32=M/36 YOU NEED TO CROSS MULTIPLY THUS YOU GET
32M=18*36
32M=648 NOW DIVIDE BOTH SIDES BY 32 WE GET
M=20.25
PROOF
18/32=20.25/36
18*36=20.25*32
648=648