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Finding the Fourth Proportional to 13,659.44, 18,850 and 7,691.13

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Solution

The fourth proportional to 13,659.44, 18,850 and 7,691.13 is: 10,613.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,659.44 : 18,850 = 7,691.13 : x
  2. Step 2: Convert to fraction form
    13,659.44/18,850 = 7,691.13/x
  3. Step 3: Cross multiply
    13,659.44x = 18,850 × 7,691.13
  4. Step 4: Simplify right side
    13,659.44x = 144,977,800.50
  5. Step 5: Solve for x
    x = 144,977,800.50/13,659.44
  6. Step 6: Final answer
    x = 10,613.74

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.