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Finding the Fourth Proportional to 12,626.78, 18,951.89 and 6,391.22

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Solution

The fourth proportional to 12,626.78, 18,951.89 and 6,391.22 is: 9,592.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,626.78 : 18,951.89 = 6,391.22 : x
  2. Step 2: Convert to fraction form
    12,626.78/18,951.89 = 6,391.22/x
  3. Step 3: Cross multiply
    12,626.78x = 18,951.89 × 6,391.22
  4. Step 4: Simplify right side
    12,626.78x = 121,125,571.69
  5. Step 5: Solve for x
    x = 121,125,571.69/12,626.78
  6. Step 6: Final answer
    x = 9,592.76

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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.