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Finding the Fourth Proportional to 8,471.76, 11,691.26 and 4,643.61

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Solution

The fourth proportional to 8,471.76, 11,691.26 and 4,643.61 is: 6,408.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,471.76 : 11,691.26 = 4,643.61 : x
  2. Step 2: Convert to fraction form
    8,471.76/11,691.26 = 4,643.61/x
  3. Step 3: Cross multiply
    8,471.76x = 11,691.26 × 4,643.61
  4. Step 4: Simplify right side
    8,471.76x = 54,289,651.85
  5. Step 5: Solve for x
    x = 54,289,651.85/8,471.76
  6. Step 6: Final answer
    x = 6,408.31

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.