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Old 14-02-11, 11:37 AM   #1
 
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Default Math Help

Was doing some GED work online and I'm stuck on one part:/

Said to solve the proportion:

4/9=X/15 (fractions)

how do I solve?
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Old 14-02-11, 11:56 AM   #2
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Default Re: Math Help

4/9 = X/15

<=> X = 15(4/9)
<=> X = 6,6 or if you prefer with fractions X= 20/3








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Old 14-02-11, 12:25 PM   #3
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Default Re: Math Help

Let's see if I remember.
I think all you have to do is cross multiply.

(4/9) = (x/15)
(4 * 15) = (x * 9)
(4 * 15) / 9 = x
x = 60/9 (20/3) or 6.6666666666667

I checked it on this site. Looks right.
However you could round up to 7 (maybe) or keep it a fraction. Depends on what you're looking for.

At least I think that's right, pretty sure it is. But it's been a while since I did math.









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Old 14-02-11, 07:27 PM   #4
 
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Default Re: Math Help

Thanks
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