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Finding the Fourth Proportional to 8,388.10, 12,582.14 and 2,147.88

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Solution

The fourth proportional to 8,388.10, 12,582.14 and 2,147.88 is: 3,221.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,388.10 : 12,582.14 = 2,147.88 : x
  2. Step 2: Convert to fraction form
    8,388.10/12,582.14 = 2,147.88/x
  3. Step 3: Cross multiply
    8,388.10x = 12,582.14 × 2,147.88
  4. Step 4: Simplify right side
    8,388.10x = 27,024,926.86
  5. Step 5: Solve for x
    x = 27,024,926.86/8,388.10
  6. Step 6: Final answer
    x = 3,221.82

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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.