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Finding the Fourth Proportional to 8,811.27, 13,212.05 and 3,620.79

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Solution

The fourth proportional to 8,811.27, 13,212.05 and 3,620.79 is: 5,429.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,811.27 : 13,212.05 = 3,620.79 : x
  2. Step 2: Convert to fraction form
    8,811.27/13,212.05 = 3,620.79/x
  3. Step 3: Cross multiply
    8,811.27x = 13,212.05 × 3,620.79
  4. Step 4: Simplify right side
    8,811.27x = 47,838,040.42
  5. Step 5: Solve for x
    x = 47,838,040.42/8,811.27
  6. Step 6: Final answer
    x = 5,429.19

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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.