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Finding the Fourth Proportional to 8,791.39, 13,189.06 and 2,947.85

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Solution

The fourth proportional to 8,791.39, 13,189.06 and 2,947.85 is: 4,422.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,791.39 : 13,189.06 = 2,947.85 : x
  2. Step 2: Convert to fraction form
    8,791.39/13,189.06 = 2,947.85/x
  3. Step 3: Cross multiply
    8,791.39x = 13,189.06 × 2,947.85
  4. Step 4: Simplify right side
    8,791.39x = 38,879,370.52
  5. Step 5: Solve for x
    x = 38,879,370.52/8,791.39
  6. Step 6: Final answer
    x = 4,422.44

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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.