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Finding the Fourth Proportional to 7,991.17, 11,991.92 and 3,608.39

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Solution

The fourth proportional to 7,991.17, 11,991.92 and 3,608.39 is: 5,414.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.17 : 11,991.92 = 3,608.39 : x
  2. Step 2: Convert to fraction form
    7,991.17/11,991.92 = 3,608.39/x
  3. Step 3: Cross multiply
    7,991.17x = 11,991.92 × 3,608.39
  4. Step 4: Simplify right side
    7,991.17x = 43,271,536.15
  5. Step 5: Solve for x
    x = 43,271,536.15/7,991.17
  6. Step 6: Final answer
    x = 5,414.92

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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.