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Finding the Fourth Proportional to 18,491.31, 25,566.60 and 17,665.11

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Solution

The fourth proportional to 18,491.31, 25,566.60 and 17,665.11 is: 24,424.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,491.31 : 25,566.60 = 17,665.11 : x
  2. Step 2: Convert to fraction form
    18,491.31/25,566.60 = 17,665.11/x
  3. Step 3: Cross multiply
    18,491.31x = 25,566.60 × 17,665.11
  4. Step 4: Simplify right side
    18,491.31x = 451,636,801.33
  5. Step 5: Solve for x
    x = 451,636,801.33/18,491.31
  6. Step 6: Final answer
    x = 24,424.27

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.