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Finding the Fourth Proportional to 18,823.81, 28,229.96 and 6,340.49

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Solution

The fourth proportional to 18,823.81, 28,229.96 and 6,340.49 is: 9,508.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,823.81 : 28,229.96 = 6,340.49 : x
  2. Step 2: Convert to fraction form
    18,823.81/28,229.96 = 6,340.49/x
  3. Step 3: Cross multiply
    18,823.81x = 28,229.96 × 6,340.49
  4. Step 4: Simplify right side
    18,823.81x = 178,991,771.15
  5. Step 5: Solve for x
    x = 178,991,771.15/18,823.81
  6. Step 6: Final answer
    x = 9,508.79

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.