Home / 8,685-18,689

Finding the Third Proportional to 8,685 and 18,689

Calculator

Solution

The third proportional to 8,685 and 18,689 is: 40,216.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,685 : 18,689 = 18,689 : x
  2. Step 2: Convert to fraction form
    8,685/18,689 = 18,689/x
  3. Step 3: Cross multiply
    8,685x = 18,689 × 18,689
  4. Step 4: Simplify right side
    8,685x = 349,278,721
  5. Step 5: Solve for x
    x = 349,278,721/8,685
  6. Step 6: Final answer
    x = 40,216.32

Related Problems

Find third proportional to 4,342.50 and 9,344.50
Half scale
Find third proportional to 17,370 and 37,378
Double scale
Find third proportional to 8,687 and 18,693
Similar ratio
Find third proportional to 13,027.50 and 28,033.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.