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Finding the Fourth Proportional to 18,908.87, 26,091.99 and 10,949.54

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Solution

The fourth proportional to 18,908.87, 26,091.99 and 10,949.54 is: 15,109.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,908.87 : 26,091.99 = 10,949.54 : x
  2. Step 2: Convert to fraction form
    18,908.87/26,091.99 = 10,949.54/x
  3. Step 3: Cross multiply
    18,908.87x = 26,091.99 × 10,949.54
  4. Step 4: Simplify right side
    18,908.87x = 285,695,157.72
  5. Step 5: Solve for x
    x = 285,695,157.72/18,908.87
  6. Step 6: Final answer
    x = 15,109.06

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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.