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Finding the Fourth Proportional to 12,229.88, 16,877.42 and 6,640.88

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Solution

The fourth proportional to 12,229.88, 16,877.42 and 6,640.88 is: 9,164.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,229.88 : 16,877.42 = 6,640.88 : x
  2. Step 2: Convert to fraction form
    12,229.88/16,877.42 = 6,640.88/x
  3. Step 3: Cross multiply
    12,229.88x = 16,877.42 × 6,640.88
  4. Step 4: Simplify right side
    12,229.88x = 112,080,920.93
  5. Step 5: Solve for x
    x = 112,080,920.93/12,229.88
  6. Step 6: Final answer
    x = 9,164.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.