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Finding the Fourth Proportional to 12,229.70, 16,876.82 and 6,640.70

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Solution

The fourth proportional to 12,229.70, 16,876.82 and 6,640.70 is: 9,164.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,229.70 : 16,876.82 = 6,640.70 : x
  2. Step 2: Convert to fraction form
    12,229.70/16,876.82 = 6,640.70/x
  3. Step 3: Cross multiply
    12,229.70x = 16,876.82 × 6,640.70
  4. Step 4: Simplify right side
    12,229.70x = 112,073,898.57
  5. Step 5: Solve for x
    x = 112,073,898.57/12,229.70
  6. Step 6: Final answer
    x = 9,164.08

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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.