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Finding the Fourth Proportional to 13,632.72, 20,446.80 and 5,628.48

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Solution

The fourth proportional to 13,632.72, 20,446.80 and 5,628.48 is: 8,441.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,632.72 : 20,446.80 = 5,628.48 : x
  2. Step 2: Convert to fraction form
    13,632.72/20,446.80 = 5,628.48/x
  3. Step 3: Cross multiply
    13,632.72x = 20,446.80 × 5,628.48
  4. Step 4: Simplify right side
    13,632.72x = 115,084,404.86
  5. Step 5: Solve for x
    x = 115,084,404.86/13,632.72
  6. Step 6: Final answer
    x = 8,441.78

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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.