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Finding the Fourth Proportional to 7,924.88, 11,891.41 and 3,485.66

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Solution

The fourth proportional to 7,924.88, 11,891.41 and 3,485.66 is: 5,230.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,924.88 : 11,891.41 = 3,485.66 : x
  2. Step 2: Convert to fraction form
    7,924.88/11,891.41 = 3,485.66/x
  3. Step 3: Cross multiply
    7,924.88x = 11,891.41 × 3,485.66
  4. Step 4: Simplify right side
    7,924.88x = 41,449,363.62
  5. Step 5: Solve for x
    x = 41,449,363.62/7,924.88
  6. Step 6: Final answer
    x = 5,230.28

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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.