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Finding the Fourth Proportional to 13,572.66, 20,358.03 and 4,212.45

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Solution

The fourth proportional to 13,572.66, 20,358.03 and 4,212.45 is: 6,318.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,572.66 : 20,358.03 = 4,212.45 : x
  2. Step 2: Convert to fraction form
    13,572.66/20,358.03 = 4,212.45/x
  3. Step 3: Cross multiply
    13,572.66x = 20,358.03 × 4,212.45
  4. Step 4: Simplify right side
    13,572.66x = 85,757,162.41
  5. Step 5: Solve for x
    x = 85,757,162.41/13,572.66
  6. Step 6: Final answer
    x = 6,318.38

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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.