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Finding the Fourth Proportional to 18,805,639.11, 25,940,786.86 and 11,825,269.11

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Solution

The fourth proportional to 18,805,639.11, 25,940,786.86 and 11,825,269.11 is: 16,311,957.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,805,639.11 : 25,940,786.86 = 11,825,269.11 : x
  2. Step 2: Convert to fraction form
    18,805,639.11/25,940,786.86 = 11,825,269.11/x
  3. Step 3: Cross multiply
    18,805,639.11x = 25,940,786.86 × 11,825,269.11
  4. Step 4: Simplify right side
    18,805,639.11x = 306,756,785,544,651.88
  5. Step 5: Solve for x
    x = 306,756,785,544,651.88/18,805,639.11
  6. Step 6: Final answer
    x = 16,311,957.48

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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.