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Finding the Fourth Proportional to 25,945.31, 38,917.97 and 8,415.14

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Solution

The fourth proportional to 25,945.31, 38,917.97 and 8,415.14 is: 12,622.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,945.31 : 38,917.97 = 8,415.14 : x
  2. Step 2: Convert to fraction form
    25,945.31/38,917.97 = 8,415.14/x
  3. Step 3: Cross multiply
    25,945.31x = 38,917.97 × 8,415.14
  4. Step 4: Simplify right side
    25,945.31x = 327,500,179.87
  5. Step 5: Solve for x
    x = 327,500,179.87/25,945.31
  6. Step 6: Final answer
    x = 12,622.71

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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.