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Finding the Fourth Proportional to 18,078.92, 27,114 and 6,978.52

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Solution

The fourth proportional to 18,078.92, 27,114 and 6,978.52 is: 10,466.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,078.92 : 27,114 = 6,978.52 : x
  2. Step 2: Convert to fraction form
    18,078.92/27,114 = 6,978.52/x
  3. Step 3: Cross multiply
    18,078.92x = 27,114 × 6,978.52
  4. Step 4: Simplify right side
    18,078.92x = 189,215,591.28
  5. Step 5: Solve for x
    x = 189,215,591.28/18,078.92
  6. Step 6: Final answer
    x = 10,466.09

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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.