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Finding the Fourth Proportional to 18,251.72, 27,388.14 and 7,165.96

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Solution

The fourth proportional to 18,251.72, 27,388.14 and 7,165.96 is: 10,753.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,251.72 : 27,388.14 = 7,165.96 : x
  2. Step 2: Convert to fraction form
    18,251.72/27,388.14 = 7,165.96/x
  3. Step 3: Cross multiply
    18,251.72x = 27,388.14 × 7,165.96
  4. Step 4: Simplify right side
    18,251.72x = 196,262,315.71
  5. Step 5: Solve for x
    x = 196,262,315.71/18,251.72
  6. Step 6: Final answer
    x = 10,753.09

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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.