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Finding the Fourth Proportional to 22,134.66, 33,172.80 and 8,979.90

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Solution

The fourth proportional to 22,134.66, 33,172.80 and 8,979.90 is: 13,458.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,134.66 : 33,172.80 = 8,979.90 : x
  2. Step 2: Convert to fraction form
    22,134.66/33,172.80 = 8,979.90/x
  3. Step 3: Cross multiply
    22,134.66x = 33,172.80 × 8,979.90
  4. Step 4: Simplify right side
    22,134.66x = 297,888,426.72
  5. Step 5: Solve for x
    x = 297,888,426.72/22,134.66
  6. Step 6: Final answer
    x = 13,458.01

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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.