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Finding the Fourth Proportional to 18,486.92, 27,724.91 and 5,339.41

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Solution

The fourth proportional to 18,486.92, 27,724.91 and 5,339.41 is: 8,007.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,486.92 : 27,724.91 = 5,339.41 : x
  2. Step 2: Convert to fraction form
    18,486.92/27,724.91 = 5,339.41/x
  3. Step 3: Cross multiply
    18,486.92x = 27,724.91 × 5,339.41
  4. Step 4: Simplify right side
    18,486.92x = 148,034,496.38
  5. Step 5: Solve for x
    x = 148,034,496.38/18,486.92
  6. Step 6: Final answer
    x = 8,007.53

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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.