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Finding the Fourth Proportional to 8,631, 12,950.82 and 3,951

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Solution

The fourth proportional to 8,631, 12,950.82 and 3,951 is: 5,928.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,631 : 12,950.82 = 3,951 : x
  2. Step 2: Convert to fraction form
    8,631/12,950.82 = 3,951/x
  3. Step 3: Cross multiply
    8,631x = 12,950.82 × 3,951
  4. Step 4: Simplify right side
    8,631x = 51,168,689.82
  5. Step 5: Solve for x
    x = 51,168,689.82/8,631
  6. Step 6: Final answer
    x = 5,928.48

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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.