Do these ratios form a proportion?
8,000 old plates to 6,000 new plates
1,000 old plates to 1,000 new plates
Yes, both ratios form a proportion.
The first ratio can be written as 8000/6000 = 8/6 = 4/3, which simplifies to 4:3.
The second ratio can be written as 1000/1000 = 1/1 = 1:1.
In both cases, the two ratios are equal to each other. Therefore, they form a proportion.