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Finding the Fourth Proportional to 20,592.76, 30,899.49 and 8,121.73

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Solution

The fourth proportional to 20,592.76, 30,899.49 and 8,121.73 is: 12,186.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,592.76 : 30,899.49 = 8,121.73 : x
  2. Step 2: Convert to fraction form
    20,592.76/30,899.49 = 8,121.73/x
  3. Step 3: Cross multiply
    20,592.76x = 30,899.49 × 8,121.73
  4. Step 4: Simplify right side
    20,592.76x = 250,957,314.92
  5. Step 5: Solve for x
    x = 250,957,314.92/20,592.76
  6. Step 6: Final answer
    x = 12,186.68

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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.