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Finding the Fourth Proportional to 8,855.20, 13,283.76 and 3,311.20

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Solution

The fourth proportional to 8,855.20, 13,283.76 and 3,311.20 is: 4,967.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,855.20 : 13,283.76 = 3,311.20 : x
  2. Step 2: Convert to fraction form
    8,855.20/13,283.76 = 3,311.20/x
  3. Step 3: Cross multiply
    8,855.20x = 13,283.76 × 3,311.20
  4. Step 4: Simplify right side
    8,855.20x = 43,985,186.11
  5. Step 5: Solve for x
    x = 43,985,186.11/8,855.20
  6. Step 6: Final answer
    x = 4,967.16

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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.