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Finding the Fourth Proportional to 12,229.86, 16,877.28 and 6,640.86

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Solution

The fourth proportional to 12,229.86, 16,877.28 and 6,640.86 is: 9,164.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,229.86 : 16,877.28 = 6,640.86 : x
  2. Step 2: Convert to fraction form
    12,229.86/16,877.28 = 6,640.86/x
  3. Step 3: Cross multiply
    12,229.86x = 16,877.28 × 6,640.86
  4. Step 4: Simplify right side
    12,229.86x = 112,079,653.66
  5. Step 5: Solve for x
    x = 112,079,653.66/12,229.86
  6. Step 6: Final answer
    x = 9,164.43

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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.