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Finding the Fourth Proportional to 22,078.71, 33,108.84 and 8,921.87

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Solution

The fourth proportional to 22,078.71, 33,108.84 and 8,921.87 is: 13,379.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,078.71 : 33,108.84 = 8,921.87 : x
  2. Step 2: Convert to fraction form
    22,078.71/33,108.84 = 8,921.87/x
  3. Step 3: Cross multiply
    22,078.71x = 33,108.84 × 8,921.87
  4. Step 4: Simplify right side
    22,078.71x = 295,392,600.79
  5. Step 5: Solve for x
    x = 295,392,600.79/22,078.71
  6. Step 6: Final answer
    x = 13,379.07

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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.