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Finding the Fourth Proportional to 18,793.49, 28,195.76 and 5,647.86

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Solution

The fourth proportional to 18,793.49, 28,195.76 and 5,647.86 is: 8,473.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,793.49 : 28,195.76 = 5,647.86 : x
  2. Step 2: Convert to fraction form
    18,793.49/28,195.76 = 5,647.86/x
  3. Step 3: Cross multiply
    18,793.49x = 28,195.76 × 5,647.86
  4. Step 4: Simplify right side
    18,793.49x = 159,245,719.19
  5. Step 5: Solve for x
    x = 159,245,719.19/18,793.49
  6. Step 6: Final answer
    x = 8,473.45

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Why These Related Problems?

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