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Finding the Fourth Proportional to 18,947.88, 26,139.78 and 18,069.48

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Solution

The fourth proportional to 18,947.88, 26,139.78 and 18,069.48 is: 24,927.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,947.88 : 26,139.78 = 18,069.48 : x
  2. Step 2: Convert to fraction form
    18,947.88/26,139.78 = 18,069.48/x
  3. Step 3: Cross multiply
    18,947.88x = 26,139.78 × 18,069.48
  4. Step 4: Simplify right side
    18,947.88x = 472,332,231.91
  5. Step 5: Solve for x
    x = 472,332,231.91/18,947.88
  6. Step 6: Final answer
    x = 24,927.97

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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.