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Finding the Fourth Proportional to 8,891.91, 13,338.36 and 3,961.89

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Solution

The fourth proportional to 8,891.91, 13,338.36 and 3,961.89 is: 5,943.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,891.91 : 13,338.36 = 3,961.89 : x
  2. Step 2: Convert to fraction form
    8,891.91/13,338.36 = 3,961.89/x
  3. Step 3: Cross multiply
    8,891.91x = 13,338.36 × 3,961.89
  4. Step 4: Simplify right side
    8,891.91x = 52,845,115.10
  5. Step 5: Solve for x
    x = 52,845,115.10/8,891.91
  6. Step 6: Final answer
    x = 5,943.06

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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.