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Finding the Fourth Proportional to 38,427, 57,640.50 and 10,725

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Solution

The fourth proportional to 38,427, 57,640.50 and 10,725 is: 16,087.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,427 : 57,640.50 = 10,725 : x
  2. Step 2: Convert to fraction form
    38,427/57,640.50 = 10,725/x
  3. Step 3: Cross multiply
    38,427x = 57,640.50 × 10,725
  4. Step 4: Simplify right side
    38,427x = 618,194,362.50
  5. Step 5: Solve for x
    x = 618,194,362.50/38,427
  6. Step 6: Final answer
    x = 16,087.50

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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.