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Finding the Fourth Proportional to 8,855.88, 13,287.20 and 3,311.70

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Solution

The fourth proportional to 8,855.88, 13,287.20 and 3,311.70 is: 4,968.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.88 : 13,287.20 = 3,311.70 : x
  2. Step 2: Convert to fraction form
    8,855.88/13,287.20 = 3,311.70/x
  3. Step 3: Cross multiply
    8,855.88x = 13,287.20 × 3,311.70
  4. Step 4: Simplify right side
    8,855.88x = 44,003,203.68
  5. Step 5: Solve for x
    x = 44,003,203.68/8,855.88
  6. Step 6: Final answer
    x = 4,968.81

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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.