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Finding the Fourth Proportional to 8,855.91, 13,286.18 and 3,309.30

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Solution

The fourth proportional to 8,855.91, 13,286.18 and 3,309.30 is: 4,964.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.91 : 13,286.18 = 3,309.30 : x
  2. Step 2: Convert to fraction form
    8,855.91/13,286.18 = 3,309.30/x
  3. Step 3: Cross multiply
    8,855.91x = 13,286.18 × 3,309.30
  4. Step 4: Simplify right side
    8,855.91x = 43,967,963.75
  5. Step 5: Solve for x
    x = 43,967,963.75/8,855.91
  6. Step 6: Final answer
    x = 4,964.82

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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.