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Finding the Fourth Proportional to 8,139.56, 12,207.92 and 3,756.65

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Solution

The fourth proportional to 8,139.56, 12,207.92 and 3,756.65 is: 5,634.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,139.56 : 12,207.92 = 3,756.65 : x
  2. Step 2: Convert to fraction form
    8,139.56/12,207.92 = 3,756.65/x
  3. Step 3: Cross multiply
    8,139.56x = 12,207.92 × 3,756.65
  4. Step 4: Simplify right side
    8,139.56x = 45,860,802.85
  5. Step 5: Solve for x
    x = 45,860,802.85/8,139.56
  6. Step 6: Final answer
    x = 5,634.31

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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.