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Finding the Fourth Proportional to 18,862.56, 28,293.80 and 8,467

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Solution

The fourth proportional to 18,862.56, 28,293.80 and 8,467 is: 12,700.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,862.56 : 28,293.80 = 8,467 : x
  2. Step 2: Convert to fraction form
    18,862.56/28,293.80 = 8,467/x
  3. Step 3: Cross multiply
    18,862.56x = 28,293.80 × 8,467
  4. Step 4: Simplify right side
    18,862.56x = 239,563,604.60
  5. Step 5: Solve for x
    x = 239,563,604.60/18,862.56
  6. Step 6: Final answer
    x = 12,700.48

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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.