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Finding the Fourth Proportional to 8,806.13, 13,213.86 and 3,879.21

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Solution

The fourth proportional to 8,806.13, 13,213.86 and 3,879.21 is: 5,820.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,806.13 : 13,213.86 = 3,879.21 : x
  2. Step 2: Convert to fraction form
    8,806.13/13,213.86 = 3,879.21/x
  3. Step 3: Cross multiply
    8,806.13x = 13,213.86 × 3,879.21
  4. Step 4: Simplify right side
    8,806.13x = 51,259,337.85
  5. Step 5: Solve for x
    x = 51,259,337.85/8,806.13
  6. Step 6: Final answer
    x = 5,820.87

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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.