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Finding the Fourth Proportional to 12,576.75, 18,865.13 and 4,791.03

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Solution

The fourth proportional to 12,576.75, 18,865.13 and 4,791.03 is: 7,186.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,576.75 : 18,865.13 = 4,791.03 : x
  2. Step 2: Convert to fraction form
    12,576.75/18,865.13 = 4,791.03/x
  3. Step 3: Cross multiply
    12,576.75x = 18,865.13 × 4,791.03
  4. Step 4: Simplify right side
    12,576.75x = 90,383,379.83
  5. Step 5: Solve for x
    x = 90,383,379.83/12,576.75
  6. Step 6: Final answer
    x = 7,186.55

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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.