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Finding the Fourth Proportional to 26,959.70, 40,402.64 and 17,105.90

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Solution

The fourth proportional to 26,959.70, 40,402.64 and 17,105.90 is: 25,635.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,959.70 : 40,402.64 = 17,105.90 : x
  2. Step 2: Convert to fraction form
    26,959.70/40,402.64 = 17,105.90/x
  3. Step 3: Cross multiply
    26,959.70x = 40,402.64 × 17,105.90
  4. Step 4: Simplify right side
    26,959.70x = 691,123,232.03
  5. Step 5: Solve for x
    x = 691,123,232.03/26,959.70
  6. Step 6: Final answer
    x = 25,635.42

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.