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Finding the Fourth Proportional to 20,620.12, 30,934.38 and 8,773.88

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Solution

The fourth proportional to 20,620.12, 30,934.38 and 8,773.88 is: 13,162.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.12 : 30,934.38 = 8,773.88 : x
  2. Step 2: Convert to fraction form
    20,620.12/30,934.38 = 8,773.88/x
  3. Step 3: Cross multiply
    20,620.12x = 30,934.38 × 8,773.88
  4. Step 4: Simplify right side
    20,620.12x = 271,414,537.99
  5. Step 5: Solve for x
    x = 271,414,537.99/20,620.12
  6. Step 6: Final answer
    x = 13,162.61

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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.