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Finding the Fourth Proportional to 20,100.60, 30,121.20 and 14,565.60

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Solution

The fourth proportional to 20,100.60, 30,121.20 and 14,565.60 is: 21,826.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,100.60 : 30,121.20 = 14,565.60 : x
  2. Step 2: Convert to fraction form
    20,100.60/30,121.20 = 14,565.60/x
  3. Step 3: Cross multiply
    20,100.60x = 30,121.20 × 14,565.60
  4. Step 4: Simplify right side
    20,100.60x = 438,733,350.72
  5. Step 5: Solve for x
    x = 438,733,350.72/20,100.60
  6. Step 6: Final answer
    x = 21,826.88

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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.