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Finding the Fourth Proportional to 6,640.38, 9,961.92 and 2,745.36

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Solution

The fourth proportional to 6,640.38, 9,961.92 and 2,745.36 is: 4,118.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.38 : 9,961.92 = 2,745.36 : x
  2. Step 2: Convert to fraction form
    6,640.38/9,961.92 = 2,745.36/x
  3. Step 3: Cross multiply
    6,640.38x = 9,961.92 × 2,745.36
  4. Step 4: Simplify right side
    6,640.38x = 27,349,056.69
  5. Step 5: Solve for x
    x = 27,349,056.69/6,640.38
  6. Step 6: Final answer
    x = 4,118.60

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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.