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Finding the Fourth Proportional to 20,367.20, 30,550.80 and 15,446.45

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Solution

The fourth proportional to 20,367.20, 30,550.80 and 15,446.45 is: 23,169.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,367.20 : 30,550.80 = 15,446.45 : x
  2. Step 2: Convert to fraction form
    20,367.20/30,550.80 = 15,446.45/x
  3. Step 3: Cross multiply
    20,367.20x = 30,550.80 × 15,446.45
  4. Step 4: Simplify right side
    20,367.20x = 471,901,404.66
  5. Step 5: Solve for x
    x = 471,901,404.66/20,367.20
  6. Step 6: Final answer
    x = 23,169.68

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Similar ratio
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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.