Home / 20,677.20-28,534.17-11,245.71

Finding the Fourth Proportional to 20,677.20, 28,534.17 and 11,245.71

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Solution

The fourth proportional to 20,677.20, 28,534.17 and 11,245.71 is: 15,518.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,677.20 : 28,534.17 = 11,245.71 : x
  2. Step 2: Convert to fraction form
    20,677.20/28,534.17 = 11,245.71/x
  3. Step 3: Cross multiply
    20,677.20x = 28,534.17 × 11,245.71
  4. Step 4: Simplify right side
    20,677.20x = 320,887,000.91
  5. Step 5: Solve for x
    x = 320,887,000.91/20,677.20
  6. Step 6: Final answer
    x = 15,518.88

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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.