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Finding the Fourth Proportional to 18,652.15, 27,978.47 and 5,504.71

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Solution

The fourth proportional to 18,652.15, 27,978.47 and 5,504.71 is: 8,257.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,652.15 : 27,978.47 = 5,504.71 : x
  2. Step 2: Convert to fraction form
    18,652.15/27,978.47 = 5,504.71/x
  3. Step 3: Cross multiply
    18,652.15x = 27,978.47 × 5,504.71
  4. Step 4: Simplify right side
    18,652.15x = 154,013,363.59
  5. Step 5: Solve for x
    x = 154,013,363.59/18,652.15
  6. Step 6: Final answer
    x = 8,257.14

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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.