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Finding the Fourth Proportional to 18,494.40, 27,749.92 and 8,636.56

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Solution

The fourth proportional to 18,494.40, 27,749.92 and 8,636.56 is: 12,958.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,494.40 : 27,749.92 = 8,636.56 : x
  2. Step 2: Convert to fraction form
    18,494.40/27,749.92 = 8,636.56/x
  3. Step 3: Cross multiply
    18,494.40x = 27,749.92 × 8,636.56
  4. Step 4: Simplify right side
    18,494.40x = 239,663,849.08
  5. Step 5: Solve for x
    x = 239,663,849.08/18,494.40
  6. Step 6: Final answer
    x = 12,958.73

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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.