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Finding the Fourth Proportional to 13,383.98, 18,471.85 and 7,717.62

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Solution

The fourth proportional to 13,383.98, 18,471.85 and 7,717.62 is: 10,651.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,383.98 : 18,471.85 = 7,717.62 : x
  2. Step 2: Convert to fraction form
    13,383.98/18,471.85 = 7,717.62/x
  3. Step 3: Cross multiply
    13,383.98x = 18,471.85 × 7,717.62
  4. Step 4: Simplify right side
    13,383.98x = 142,558,719.00
  5. Step 5: Solve for x
    x = 142,558,719.00/13,383.98
  6. Step 6: Final answer
    x = 10,651.44

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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.