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Finding the Fourth Proportional to 18,805.08, 28,194.66 and 8,936.04

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Solution

The fourth proportional to 18,805.08, 28,194.66 and 8,936.04 is: 13,397.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805.08 : 28,194.66 = 8,936.04 : x
  2. Step 2: Convert to fraction form
    18,805.08/28,194.66 = 8,936.04/x
  3. Step 3: Cross multiply
    18,805.08x = 28,194.66 × 8,936.04
  4. Step 4: Simplify right side
    18,805.08x = 251,948,609.55
  5. Step 5: Solve for x
    x = 251,948,609.55/18,805.08
  6. Step 6: Final answer
    x = 13,397.90

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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.