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Finding the Fourth Proportional to 10,640.61, 15,962.32 and 5,645.54

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Solution

The fourth proportional to 10,640.61, 15,962.32 and 5,645.54 is: 8,469.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.61 : 15,962.32 = 5,645.54 : x
  2. Step 2: Convert to fraction form
    10,640.61/15,962.32 = 5,645.54/x
  3. Step 3: Cross multiply
    10,640.61x = 15,962.32 × 5,645.54
  4. Step 4: Simplify right side
    10,640.61x = 90,115,863.68
  5. Step 5: Solve for x
    x = 90,115,863.68/10,640.61
  6. Step 6: Final answer
    x = 8,469.05

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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.