Home / 20,581.85-28,402.94-11,150.41

Finding the Fourth Proportional to 20,581.85, 28,402.94 and 11,150.41

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Solution

The fourth proportional to 20,581.85, 28,402.94 and 11,150.41 is: 15,387.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,581.85 : 28,402.94 = 11,150.41 : x
  2. Step 2: Convert to fraction form
    20,581.85/28,402.94 = 11,150.41/x
  3. Step 3: Cross multiply
    20,581.85x = 28,402.94 × 11,150.41
  4. Step 4: Simplify right side
    20,581.85x = 316,704,373.61
  5. Step 5: Solve for x
    x = 316,704,373.61/20,581.85
  6. Step 6: Final answer
    x = 15,387.56

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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.