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Finding the Fourth Proportional to 18,611.78, 27,917.46 and 5,463.65

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Solution

The fourth proportional to 18,611.78, 27,917.46 and 5,463.65 is: 8,195.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,611.78 : 27,917.46 = 5,463.65 : x
  2. Step 2: Convert to fraction form
    18,611.78/27,917.46 = 5,463.65/x
  3. Step 3: Cross multiply
    18,611.78x = 27,917.46 × 5,463.65
  4. Step 4: Simplify right side
    18,611.78x = 152,531,300.12
  5. Step 5: Solve for x
    x = 152,531,300.12/18,611.78
  6. Step 6: Final answer
    x = 8,195.42

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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.