Home / 8,660-18,721

Finding the Third Proportional to 8,660 and 18,721

Calculator

Solution

The third proportional to 8,660 and 18,721 is: 40,470.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660 : 18,721 = 18,721 : x
  2. Step 2: Convert to fraction form
    8,660/18,721 = 18,721/x
  3. Step 3: Cross multiply
    8,660x = 18,721 × 18,721
  4. Step 4: Simplify right side
    8,660x = 350,475,841
  5. Step 5: Solve for x
    x = 350,475,841/8,660
  6. Step 6: Final answer
    x = 40,470.65

Related Problems

Find third proportional to 4,330 and 9,360.50
Half scale
Find third proportional to 17,320 and 37,442
Double scale
Find third proportional to 8,662 and 18,725
Similar ratio
Find third proportional to 12,990 and 28,081.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.16) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.