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Finding the Fourth Proportional to 10,640.80, 15,960.60 and 3,244.64

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Solution

The fourth proportional to 10,640.80, 15,960.60 and 3,244.64 is: 4,866.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,640.80 : 15,960.60 = 3,244.64 : x
  2. Step 2: Convert to fraction form
    10,640.80/15,960.60 = 3,244.64/x
  3. Step 3: Cross multiply
    10,640.80x = 15,960.60 × 3,244.64
  4. Step 4: Simplify right side
    10,640.80x = 51,786,401.18
  5. Step 5: Solve for x
    x = 51,786,401.18/10,640.80
  6. Step 6: Final answer
    x = 4,866.78

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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.