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Finding the Fourth Proportional to 6,640.20, 9,960.30 and 6,348.60

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Solution

The fourth proportional to 6,640.20, 9,960.30 and 6,348.60 is: 9,522.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.20 : 9,960.30 = 6,348.60 : x
  2. Step 2: Convert to fraction form
    6,640.20/9,960.30 = 6,348.60/x
  3. Step 3: Cross multiply
    6,640.20x = 9,960.30 × 6,348.60
  4. Step 4: Simplify right side
    6,640.20x = 63,233,960.58
  5. Step 5: Solve for x
    x = 63,233,960.58/6,640.20
  6. Step 6: Final answer
    x = 9,522.90

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1.5x scale

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.