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Finding the Fourth Proportional to 18,791.76, 25,933.42 and 10,408.26

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Solution

The fourth proportional to 18,791.76, 25,933.42 and 10,408.26 is: 14,363.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,791.76 : 25,933.42 = 10,408.26 : x
  2. Step 2: Convert to fraction form
    18,791.76/25,933.42 = 10,408.26/x
  3. Step 3: Cross multiply
    18,791.76x = 25,933.42 × 10,408.26
  4. Step 4: Simplify right side
    18,791.76x = 269,921,778.05
  5. Step 5: Solve for x
    x = 269,921,778.05/18,791.76
  6. Step 6: Final answer
    x = 14,363.84

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1.5x scale

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.