I know the center locations for two circles of unknown diameter that are tangent to each other, and I know what their ratio is to one another. I want to make sure the diameters are viable for the build when the circles have a ratio of 8-to-1.

I can't drive either of the diameters, but to be clear, I know that I can measure the distance between the centers, divide by 9 and multiply the product by 16.

I'm asking if this is possible without intermediate dimensions. I prefer to include the absolute minimum construction geometry or intermediate dimensions in sketches, and I'd like to know if this is possible without it.

Draw a line. Split the line with the Segment tool in to 9 equal segments. Draw a circle that spans one segment and another circle that spans 8 segments.