How do you use cross products to solve 2/9=c/27?

3 Answers
G_Ozdilek
Apr 16, 2018

Just arrange the equation

Explanation:

2/9 = c/27

2times27 = ctimes9

(2times27)/9 = c

2times3=c

6=c

Siddharth Dushanatha · Sahar Mulla ❤
Apr 16, 2018

c = 6

Explanation:

First we need to cross multiply.
2 xx 27 = 9 xx c

Which gives us...
54 = 9c

To make the next step easy, we will flip the equation
9c = 54

Now we can find the value of c
c = 54 / 9

c = 6

Jim G.
Apr 16, 2018

c=6

Explanation:

"given equal fractions then we can solve using "color(blue)"cross-products"

"that is "a/b=c/drArrbc=adlarrcolor(blue)"cross-products"

"applying this to "2/9=c/27" gives"

9c=2xx27

rArr9c=54

"divide both sides by 9"

(cancel(9) c)/cancel(9)=54/9

rArrc=6

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