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Finding the Fourth Proportional to 18,481.87, 27,729.69 and 11,091.63

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Solution

The fourth proportional to 18,481.87, 27,729.69 and 11,091.63 is: 16,641.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,481.87 : 27,729.69 = 11,091.63 : x
  2. Step 2: Convert to fraction form
    18,481.87/27,729.69 = 11,091.63/x
  3. Step 3: Cross multiply
    18,481.87x = 27,729.69 × 11,091.63
  4. Step 4: Simplify right side
    18,481.87x = 307,567,461.49
  5. Step 5: Solve for x
    x = 307,567,461.49/18,481.87
  6. Step 6: Final answer
    x = 16,641.58

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1.5x scale

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.