Home / 20,581.71-28,402.97-11,150.61

Finding the Fourth Proportional to 20,581.71, 28,402.97 and 11,150.61

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Solution

The fourth proportional to 20,581.71, 28,402.97 and 11,150.61 is: 15,387.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.71 : 28,402.97 = 11,150.61 : x
  2. Step 2: Convert to fraction form
    20,581.71/28,402.97 = 11,150.61/x
  3. Step 3: Cross multiply
    20,581.71x = 28,402.97 × 11,150.61
  4. Step 4: Simplify right side
    20,581.71x = 316,710,327.17
  5. Step 5: Solve for x
    x = 316,710,327.17/20,581.71
  6. Step 6: Final answer
    x = 15,387.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.