Question

what ratio forms a proportion?
a.3/15,12/55
b.8/24,12/34
c.5/18,25/90
d.4/11,16/25

Answer 1

find a ratio between the two fractions, when there is a common ratio between the fractions, that is when there is a proportion.

for example, if you have 2/3 and 7/8, you could either make both fractions into decimals... so .667 and .875
(which are not the same number, so they are not a proportion)

or

you could do 7 divided by 2 over 8 divided by 3, which if it was a proportion should equal 1...
3.5/2.667 does not equal 1, so it is not a proportion


both ways are correct, it is just whichever you find easier.

Answer 2

3/15 and 12/55 12 divided by 3 is 4 and 55divided by 15 is 3.7 so its not a proportion

Answer 3

is it c

Answer 4

1. Which ratios form a proportion?
Answer: C. 5/18 25/90

2. Which ratios form a proportion with 9/15?
Answer: A. 6/10

3. A textbook weighs 2.5 pounds. How many kilograms does the textbook weigh? Round your answer to the nearest tenth of a pound. 1kg=2.2lb
Answer: A. 1.1kg

4. Slove the proportion using number sense. 2/8=x/48
Answer: B. 12

5. Solve for proportion using cross products. 18/20=k/110
Answer: A. 99

Answer 5

as a dumb person on here he is indeed correct