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Finding the Fourth Proportional to 18,605.44, 25,683.20 and 11,152

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Solution

The fourth proportional to 18,605.44, 25,683.20 and 11,152 is: 15,394.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,605.44 : 25,683.20 = 11,152 : x
  2. Step 2: Convert to fraction form
    18,605.44/25,683.20 = 11,152/x
  3. Step 3: Cross multiply
    18,605.44x = 25,683.20 × 11,152
  4. Step 4: Simplify right side
    18,605.44x = 286,419,046.40
  5. Step 5: Solve for x
    x = 286,419,046.40/18,605.44
  6. Step 6: Final answer
    x = 15,394.37

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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.