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Finding the Fourth Proportional to 18,761.60, 25,887.84 and 11,690.24

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Solution

The fourth proportional to 18,761.60, 25,887.84 and 11,690.24 is: 16,130.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,761.60 : 25,887.84 = 11,690.24 : x
  2. Step 2: Convert to fraction form
    18,761.60/25,887.84 = 11,690.24/x
  3. Step 3: Cross multiply
    18,761.60x = 25,887.84 × 11,690.24
  4. Step 4: Simplify right side
    18,761.60x = 302,635,062.68
  5. Step 5: Solve for x
    x = 302,635,062.68/18,761.60
  6. Step 6: Final answer
    x = 16,130.56

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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.