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Finding the Fourth Proportional to 18,610.92, 27,910.98 and 6,921.36

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Solution

The fourth proportional to 18,610.92, 27,910.98 and 6,921.36 is: 10,380.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,610.92 : 27,910.98 = 6,921.36 : x
  2. Step 2: Convert to fraction form
    18,610.92/27,910.98 = 6,921.36/x
  3. Step 3: Cross multiply
    18,610.92x = 27,910.98 × 6,921.36
  4. Step 4: Simplify right side
    18,610.92x = 193,181,940.53
  5. Step 5: Solve for x
    x = 193,181,940.53/18,610.92
  6. Step 6: Final answer
    x = 10,380.03

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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.