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Finding the Fourth Proportional to 7,991.33, 11,978.91 and 3,304.86

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Solution

The fourth proportional to 7,991.33, 11,978.91 and 3,304.86 is: 4,953.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.33 : 11,978.91 = 3,304.86 : x
  2. Step 2: Convert to fraction form
    7,991.33/11,978.91 = 3,304.86/x
  3. Step 3: Cross multiply
    7,991.33x = 11,978.91 × 3,304.86
  4. Step 4: Simplify right side
    7,991.33x = 39,588,620.50
  5. Step 5: Solve for x
    x = 39,588,620.50/7,991.33
  6. Step 6: Final answer
    x = 4,953.95

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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.