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Finding the Fourth Proportional to 18,597.14, 25,651.31 and 11,879.78

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Solution

The fourth proportional to 18,597.14, 25,651.31 and 11,879.78 is: 16,385.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,597.14 : 25,651.31 = 11,879.78 : x
  2. Step 2: Convert to fraction form
    18,597.14/25,651.31 = 11,879.78/x
  3. Step 3: Cross multiply
    18,597.14x = 25,651.31 × 11,879.78
  4. Step 4: Simplify right side
    18,597.14x = 304,732,013.34
  5. Step 5: Solve for x
    x = 304,732,013.34/18,597.14
  6. Step 6: Final answer
    x = 16,385.96

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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.