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Finding the Fourth Proportional to 7,811.79, 11,717.90 and 3,067.75

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Solution

The fourth proportional to 7,811.79, 11,717.90 and 3,067.75 is: 4,601.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,811.79 : 11,717.90 = 3,067.75 : x
  2. Step 2: Convert to fraction form
    7,811.79/11,717.90 = 3,067.75/x
  3. Step 3: Cross multiply
    7,811.79x = 11,717.90 × 3,067.75
  4. Step 4: Simplify right side
    7,811.79x = 35,947,587.73
  5. Step 5: Solve for x
    x = 35,947,587.73/7,811.79
  6. Step 6: Final answer
    x = 4,601.71

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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.