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Finding the Fourth Proportional to 15,201.72, 22,787.09 and 8,613.99

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Solution

The fourth proportional to 15,201.72, 22,787.09 and 8,613.99 is: 12,912.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,201.72 : 22,787.09 = 8,613.99 : x
  2. Step 2: Convert to fraction form
    15,201.72/22,787.09 = 8,613.99/x
  3. Step 3: Cross multiply
    15,201.72x = 22,787.09 × 8,613.99
  4. Step 4: Simplify right side
    15,201.72x = 196,287,754.62
  5. Step 5: Solve for x
    x = 196,287,754.62/15,201.72
  6. Step 6: Final answer
    x = 12,912.21

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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.