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Finding the Fourth Proportional to 18,481.79, 27,722.28 and 5,154.43

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Solution

The fourth proportional to 18,481.79, 27,722.28 and 5,154.43 is: 7,731.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.79 : 27,722.28 = 5,154.43 : x
  2. Step 2: Convert to fraction form
    18,481.79/27,722.28 = 5,154.43/x
  3. Step 3: Cross multiply
    18,481.79x = 27,722.28 × 5,154.43
  4. Step 4: Simplify right side
    18,481.79x = 142,892,605.68
  5. Step 5: Solve for x
    x = 142,892,605.68/18,481.79
  6. Step 6: Final answer
    x = 7,731.53

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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.