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Finding the Fourth Proportional to 19,402.82, 26,775.18 and 11,861.78

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Solution

The fourth proportional to 19,402.82, 26,775.18 and 11,861.78 is: 16,368.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,402.82 : 26,775.18 = 11,861.78 : x
  2. Step 2: Convert to fraction form
    19,402.82/26,775.18 = 11,861.78/x
  3. Step 3: Cross multiply
    19,402.82x = 26,775.18 × 11,861.78
  4. Step 4: Simplify right side
    19,402.82x = 317,601,294.62
  5. Step 5: Solve for x
    x = 317,601,294.62/19,402.82
  6. Step 6: Final answer
    x = 16,368.82

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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.