Home / 39,489.12-59,155.38-20,740.86

Finding the Fourth Proportional to 39,489.12, 59,155.38 and 20,740.86

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Solution

The fourth proportional to 39,489.12, 59,155.38 and 20,740.86 is: 31,070.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,489.12 : 59,155.38 = 20,740.86 : x
  2. Step 2: Convert to fraction form
    39,489.12/59,155.38 = 20,740.86/x
  3. Step 3: Cross multiply
    39,489.12x = 59,155.38 × 20,740.86
  4. Step 4: Simplify right side
    39,489.12x = 1,226,933,454.83
  5. Step 5: Solve for x
    x = 1,226,933,454.83/39,489.12
  6. Step 6: Final answer
    x = 31,070.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.