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Finding the Fourth Proportional to 18,976.70, 26,198.31 and 11,424.87

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Solution

The fourth proportional to 18,976.70, 26,198.31 and 11,424.87 is: 15,772.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,976.70 : 26,198.31 = 11,424.87 : x
  2. Step 2: Convert to fraction form
    18,976.70/26,198.31 = 11,424.87/x
  3. Step 3: Cross multiply
    18,976.70x = 26,198.31 × 11,424.87
  4. Step 4: Simplify right side
    18,976.70x = 299,312,285.97
  5. Step 5: Solve for x
    x = 299,312,285.97/18,976.70
  6. Step 6: Final answer
    x = 15,772.62

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.