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Finding the Fourth Proportional to 20,550.58, 30,800.92 and 8,699.78

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Solution

The fourth proportional to 20,550.58, 30,800.92 and 8,699.78 is: 13,039.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,550.58 : 30,800.92 = 8,699.78 : x
  2. Step 2: Convert to fraction form
    20,550.58/30,800.92 = 8,699.78/x
  3. Step 3: Cross multiply
    20,550.58x = 30,800.92 × 8,699.78
  4. Step 4: Simplify right side
    20,550.58x = 267,961,227.80
  5. Step 5: Solve for x
    x = 267,961,227.80/20,550.58
  6. Step 6: Final answer
    x = 13,039.11

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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.