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Finding the Fourth Proportional to 18,481.86, 27,721.98 and 5,334.78

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Solution

The fourth proportional to 18,481.86, 27,721.98 and 5,334.78 is: 8,001.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.86 : 27,721.98 = 5,334.78 : x
  2. Step 2: Convert to fraction form
    18,481.86/27,721.98 = 5,334.78/x
  3. Step 3: Cross multiply
    18,481.86x = 27,721.98 × 5,334.78
  4. Step 4: Simplify right side
    18,481.86x = 147,890,664.46
  5. Step 5: Solve for x
    x = 147,890,664.46/18,481.86
  6. Step 6: Final answer
    x = 8,001.94

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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.