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Finding the Fourth Proportional to 8,687.72, 13,014.12 and 4,001.20

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Solution

The fourth proportional to 8,687.72, 13,014.12 and 4,001.20 is: 5,993.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,687.72 : 13,014.12 = 4,001.20 : x
  2. Step 2: Convert to fraction form
    8,687.72/13,014.12 = 4,001.20/x
  3. Step 3: Cross multiply
    8,687.72x = 13,014.12 × 4,001.20
  4. Step 4: Simplify right side
    8,687.72x = 52,072,096.94
  5. Step 5: Solve for x
    x = 52,072,096.94/8,687.72
  6. Step 6: Final answer
    x = 5,993.76

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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.