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Finding the Fourth Proportional to 22,226.78, 30,662.68 and 12,789.88

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Solution

The fourth proportional to 22,226.78, 30,662.68 and 12,789.88 is: 17,644.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,226.78 : 30,662.68 = 12,789.88 : x
  2. Step 2: Convert to fraction form
    22,226.78/30,662.68 = 12,789.88/x
  3. Step 3: Cross multiply
    22,226.78x = 30,662.68 × 12,789.88
  4. Step 4: Simplify right side
    22,226.78x = 392,171,997.68
  5. Step 5: Solve for x
    x = 392,171,997.68/22,226.78
  6. Step 6: Final answer
    x = 17,644.12

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.