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Finding the Fourth Proportional to 9,331.59, 12,879.48 and 5,355.43

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Solution

The fourth proportional to 9,331.59, 12,879.48 and 5,355.43 is: 7,391.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,331.59 : 12,879.48 = 5,355.43 : x
  2. Step 2: Convert to fraction form
    9,331.59/12,879.48 = 5,355.43/x
  3. Step 3: Cross multiply
    9,331.59x = 12,879.48 × 5,355.43
  4. Step 4: Simplify right side
    9,331.59x = 68,975,153.58
  5. Step 5: Solve for x
    x = 68,975,153.58/9,331.59
  6. Step 6: Final answer
    x = 7,391.58

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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.