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Finding the Fourth Proportional to 8,872.69, 13,312.11 and 3,945.79

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Solution

The fourth proportional to 8,872.69, 13,312.11 and 3,945.79 is: 5,920.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,872.69 : 13,312.11 = 3,945.79 : x
  2. Step 2: Convert to fraction form
    8,872.69/13,312.11 = 3,945.79/x
  3. Step 3: Cross multiply
    8,872.69x = 13,312.11 × 3,945.79
  4. Step 4: Simplify right side
    8,872.69x = 52,526,790.52
  5. Step 5: Solve for x
    x = 52,526,790.52/8,872.69
  6. Step 6: Final answer
    x = 5,920.05

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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.