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Finding the Fourth Proportional to 12,659.44, 18,989.18 and 3,894.42

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Solution

The fourth proportional to 12,659.44, 18,989.18 and 3,894.42 is: 5,841.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,659.44 : 18,989.18 = 3,894.42 : x
  2. Step 2: Convert to fraction form
    12,659.44/18,989.18 = 3,894.42/x
  3. Step 3: Cross multiply
    12,659.44x = 18,989.18 × 3,894.42
  4. Step 4: Simplify right side
    12,659.44x = 73,951,842.38
  5. Step 5: Solve for x
    x = 73,951,842.38/12,659.44
  6. Step 6: Final answer
    x = 5,841.64

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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.