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Finding the Fourth Proportional to 6,640.92, 9,098.10 and 6,391.80

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Solution

The fourth proportional to 6,640.92, 9,098.10 and 6,391.80 is: 8,756.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,640.92 : 9,098.10 = 6,391.80 : x
  2. Step 2: Convert to fraction form
    6,640.92/9,098.10 = 6,391.80/x
  3. Step 3: Cross multiply
    6,640.92x = 9,098.10 × 6,391.80
  4. Step 4: Simplify right side
    6,640.92x = 58,153,235.58
  5. Step 5: Solve for x
    x = 58,153,235.58/6,640.92
  6. Step 6: Final answer
    x = 8,756.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.