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Finding the Fourth Proportional to 8,789.91, 13,164.07 and 7,629.38

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Solution

The fourth proportional to 8,789.91, 13,164.07 and 7,629.38 is: 11,426.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789.91 : 13,164.07 = 7,629.38 : x
  2. Step 2: Convert to fraction form
    8,789.91/13,164.07 = 7,629.38/x
  3. Step 3: Cross multiply
    8,789.91x = 13,164.07 × 7,629.38
  4. Step 4: Simplify right side
    8,789.91x = 100,433,692.38
  5. Step 5: Solve for x
    x = 100,433,692.38/8,789.91
  6. Step 6: Final answer
    x = 11,426.02

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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.