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Finding the Fourth Proportional to 18,757.89, 25,865.28 and 12,040.98

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Solution

The fourth proportional to 18,757.89, 25,865.28 and 12,040.98 is: 16,603.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,757.89 : 25,865.28 = 12,040.98 : x
  2. Step 2: Convert to fraction form
    18,757.89/25,865.28 = 12,040.98/x
  3. Step 3: Cross multiply
    18,757.89x = 25,865.28 × 12,040.98
  4. Step 4: Simplify right side
    18,757.89x = 311,443,319.17
  5. Step 5: Solve for x
    x = 311,443,319.17/18,757.89
  6. Step 6: Final answer
    x = 16,603.32

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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.