Question

Which of the following is equivalent to the proportion?

Answer 1

\[3 \over 4 \]\[equals \]\[x? \over 12 \]

Answer 2

3/4 = x?/12

Answer 3

What number do you multiply 4 by to get 12?

Answer 4

A. 4/3 = 12/x
B. 3/4 = 12/x
C. 4/3 = x/12
D. 4/12 = x/3

Answer 5

3

Answer 6

So you have to multiply the 3 in the numerator by 3 to balance everything out

Answer 7

3*3 = 9
4*3 = 12


So

3/4

is equivalent to

9/12

Answer 8

So x has to be 9

Answer 9

alright , so then where would i go from there ? if i have 3/4 = 9/12 ?
would i divide ?

Answer 10

what do you mean

Answer 11

i'm confused as to what would be my answer then .. i listed the answer choices above .

Answer 12

ok let me have a look real quick

Answer 13

okayyy

Answer 14

ah i see what they want

Answer 15

If you have a/b = c/d, basically two fractions equal to one another, you can flip both fractions to get

b/a = d/c

and this equation will still be true

Answer 16

ex:

1/2 = 2/4

flip both sides

2/1 = 4/2

and that's still true

Answer 17

ah so confused how to get that !

Answer 18

you can think of it like this

1/2 = 2/4

1*4 = 2*2 ... cross multiply

4 = 2*2/1 ... Divide both sides by 1

4/2 = 2/1 ... Divide both sides by 2

So this shows us how 1/2 = 2/4 is equivalent to 2/1 = 4/2

Answer 19

Does that make sense?

Answer 20

3/4 = x/12 this is your original equation
there are things called reciprocals
this is where you just flip the fraction upside down but if you do it to the left you have to do it to the right.
so 3/4 flipped upside down gives you 4/3
but now we have to do it to the right
x/12 becomes 12/x