Home / 20,439-31,659

Finding the Third Proportional to 20,439 and 31,659

Calculator

Solution

The third proportional to 20,439 and 31,659 is: 49,038.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,439 : 31,659 = 31,659 : x
  2. Step 2: Convert to fraction form
    20,439/31,659 = 31,659/x
  3. Step 3: Cross multiply
    20,439x = 31,659 × 31,659
  4. Step 4: Simplify right side
    20,439x = 1,002,292,281
  5. Step 5: Solve for x
    x = 1,002,292,281/20,439
  6. Step 6: Final answer
    x = 49,038.23

Related Problems

Find third proportional to 10,219.50 and 15,829.50
Half scale
Find third proportional to 40,878 and 63,318
Double scale
Find third proportional to 20,441 and 31,662
Similar ratio
Find third proportional to 30,658.50 and 47,488.50
1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.55) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.