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Finding the Fourth Proportional to 18,296.20, 25,249.92 and 11,131.16

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Solution

The fourth proportional to 18,296.20, 25,249.92 and 11,131.16 is: 15,361.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,296.20 : 25,249.92 = 11,131.16 : x
  2. Step 2: Convert to fraction form
    18,296.20/25,249.92 = 11,131.16/x
  3. Step 3: Cross multiply
    18,296.20x = 25,249.92 × 11,131.16
  4. Step 4: Simplify right side
    18,296.20x = 281,060,899.51
  5. Step 5: Solve for x
    x = 281,060,899.51/18,296.20
  6. Step 6: Final answer
    x = 15,361.71

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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.