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Finding the Fourth Proportional to 18,541.92, 27,806.28 and 5,390.88

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Solution

The fourth proportional to 18,541.92, 27,806.28 and 5,390.88 is: 8,084.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,541.92 : 27,806.28 = 5,390.88 : x
  2. Step 2: Convert to fraction form
    18,541.92/27,806.28 = 5,390.88/x
  3. Step 3: Cross multiply
    18,541.92x = 27,806.28 × 5,390.88
  4. Step 4: Simplify right side
    18,541.92x = 149,900,318.73
  5. Step 5: Solve for x
    x = 149,900,318.73/18,541.92
  6. Step 6: Final answer
    x = 8,084.40

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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.