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Finding the Fourth Proportional to 18,629.28, 25,708.44 and 10,245.78

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Solution

The fourth proportional to 18,629.28, 25,708.44 and 10,245.78 is: 14,139.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,629.28 : 25,708.44 = 10,245.78 : x
  2. Step 2: Convert to fraction form
    18,629.28/25,708.44 = 10,245.78/x
  3. Step 3: Cross multiply
    18,629.28x = 25,708.44 × 10,245.78
  4. Step 4: Simplify right side
    18,629.28x = 263,403,020.38
  5. Step 5: Solve for x
    x = 263,403,020.38/18,629.28
  6. Step 6: Final answer
    x = 14,139.19

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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.