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Finding the Fourth Proportional to 28,576.92, 42,876.62 and 8,857

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Solution

The fourth proportional to 28,576.92, 42,876.62 and 8,857 is: 13,288.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,576.92 : 42,876.62 = 8,857 : x
  2. Step 2: Convert to fraction form
    28,576.92/42,876.62 = 8,857/x
  3. Step 3: Cross multiply
    28,576.92x = 42,876.62 × 8,857
  4. Step 4: Simplify right side
    28,576.92x = 379,758,223.34
  5. Step 5: Solve for x
    x = 379,758,223.34/28,576.92
  6. Step 6: Final answer
    x = 13,288.98

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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.