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Finding the Fourth Proportional to 11,663.90, 17,491.30 and 5,085.60

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Solution

The fourth proportional to 11,663.90, 17,491.30 and 5,085.60 is: 7,626.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,663.90 : 17,491.30 = 5,085.60 : x
  2. Step 2: Convert to fraction form
    11,663.90/17,491.30 = 5,085.60/x
  3. Step 3: Cross multiply
    11,663.90x = 17,491.30 × 5,085.60
  4. Step 4: Simplify right side
    11,663.90x = 88,953,755.28
  5. Step 5: Solve for x
    x = 88,953,755.28/11,663.90
  6. Step 6: Final answer
    x = 7,626.42

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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.