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Finding the Fourth Proportional to 18,896.92, 28,335.66 and 8,503

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Solution

The fourth proportional to 18,896.92, 28,335.66 and 8,503 is: 12,750.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,896.92 : 28,335.66 = 8,503 : x
  2. Step 2: Convert to fraction form
    18,896.92/28,335.66 = 8,503/x
  3. Step 3: Cross multiply
    18,896.92x = 28,335.66 × 8,503
  4. Step 4: Simplify right side
    18,896.92x = 240,938,116.98
  5. Step 5: Solve for x
    x = 240,938,116.98/18,896.92
  6. Step 6: Final answer
    x = 12,750.13

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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.