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Finding the Fourth Proportional to 7,908.69, 11,859.13 and 2,641.90

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Solution

The fourth proportional to 7,908.69, 11,859.13 and 2,641.90 is: 3,961.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,908.69 : 11,859.13 = 2,641.90 : x
  2. Step 2: Convert to fraction form
    7,908.69/11,859.13 = 2,641.90/x
  3. Step 3: Cross multiply
    7,908.69x = 11,859.13 × 2,641.90
  4. Step 4: Simplify right side
    7,908.69x = 31,330,584.47
  5. Step 5: Solve for x
    x = 31,330,584.47/7,908.69
  6. Step 6: Final answer
    x = 3,961.54

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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.