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Finding the Fourth Proportional to 12,086.48, 18,125.88 and 8,215.76

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Solution

The fourth proportional to 12,086.48, 18,125.88 and 8,215.76 is: 12,321.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,086.48 : 18,125.88 = 8,215.76 : x
  2. Step 2: Convert to fraction form
    12,086.48/18,125.88 = 8,215.76/x
  3. Step 3: Cross multiply
    12,086.48x = 18,125.88 × 8,215.76
  4. Step 4: Simplify right side
    12,086.48x = 148,917,879.87
  5. Step 5: Solve for x
    x = 148,917,879.87/12,086.48
  6. Step 6: Final answer
    x = 12,321.03

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.