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Finding the Fourth Proportional to 25,935.80, 38,909.86 and 11,144.86

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Solution

The fourth proportional to 25,935.80, 38,909.86 and 11,144.86 is: 16,719.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,935.80 : 38,909.86 = 11,144.86 : x
  2. Step 2: Convert to fraction form
    25,935.80/38,909.86 = 11,144.86/x
  3. Step 3: Cross multiply
    25,935.80x = 38,909.86 × 11,144.86
  4. Step 4: Simplify right side
    25,935.80x = 433,644,942.32
  5. Step 5: Solve for x
    x = 433,644,942.32/25,935.80
  6. Step 6: Final answer
    x = 16,719.94

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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.