Home / 20,867.20-31,329.60-16,489.60

Finding the Fourth Proportional to 20,867.20, 31,329.60 and 16,489.60

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Solution

The fourth proportional to 20,867.20, 31,329.60 and 16,489.60 is: 24,757.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,867.20 : 31,329.60 = 16,489.60 : x
  2. Step 2: Convert to fraction form
    20,867.20/31,329.60 = 16,489.60/x
  3. Step 3: Cross multiply
    20,867.20x = 31,329.60 × 16,489.60
  4. Step 4: Simplify right side
    20,867.20x = 516,612,572.16
  5. Step 5: Solve for x
    x = 516,612,572.16/20,867.20
  6. Step 6: Final answer
    x = 24,757.16

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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.