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Finding the Fourth Proportional to 6,649.40, 9,963.30 and 4,179.80

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Solution

The fourth proportional to 6,649.40, 9,963.30 and 4,179.80 is: 6,262.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,649.40 : 9,963.30 = 4,179.80 : x
  2. Step 2: Convert to fraction form
    6,649.40/9,963.30 = 4,179.80/x
  3. Step 3: Cross multiply
    6,649.40x = 9,963.30 × 4,179.80
  4. Step 4: Simplify right side
    6,649.40x = 41,644,601.34
  5. Step 5: Solve for x
    x = 41,644,601.34/6,649.40
  6. Step 6: Final answer
    x = 6,262.91

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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.