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Finding the Fourth Proportional to 18,753.76, 25,885.15 and 11,675.98

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Solution

The fourth proportional to 18,753.76, 25,885.15 and 11,675.98 is: 16,115.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,753.76 : 25,885.15 = 11,675.98 : x
  2. Step 2: Convert to fraction form
    18,753.76/25,885.15 = 11,675.98/x
  3. Step 3: Cross multiply
    18,753.76x = 25,885.15 × 11,675.98
  4. Step 4: Simplify right side
    18,753.76x = 302,234,493.70
  5. Step 5: Solve for x
    x = 302,234,493.70/18,753.76
  6. Step 6: Final answer
    x = 16,115.94

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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.