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Finding the Fourth Proportional to 18,672.44, 28,013.01 and 8,285

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Solution

The fourth proportional to 18,672.44, 28,013.01 and 8,285 is: 12,429.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.44 : 28,013.01 = 8,285 : x
  2. Step 2: Convert to fraction form
    18,672.44/28,013.01 = 8,285/x
  3. Step 3: Cross multiply
    18,672.44x = 28,013.01 × 8,285
  4. Step 4: Simplify right side
    18,672.44x = 232,087,787.85
  5. Step 5: Solve for x
    x = 232,087,787.85/18,672.44
  6. Step 6: Final answer
    x = 12,429.43

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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.