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Finding the Fourth Proportional to 18,789.76, 25,923.99 and 10,830.91

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Solution

The fourth proportional to 18,789.76, 25,923.99 and 10,830.91 is: 14,943.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,789.76 : 25,923.99 = 10,830.91 : x
  2. Step 2: Convert to fraction form
    18,789.76/25,923.99 = 10,830.91/x
  3. Step 3: Cross multiply
    18,789.76x = 25,923.99 × 10,830.91
  4. Step 4: Simplify right side
    18,789.76x = 280,780,402.53
  5. Step 5: Solve for x
    x = 280,780,402.53/18,789.76
  6. Step 6: Final answer
    x = 14,943.27

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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.