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Finding the Fourth Proportional to 11,891.58, 17,836.77 and 3,994.20

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Solution

The fourth proportional to 11,891.58, 17,836.77 and 3,994.20 is: 5,991.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.58 : 17,836.77 = 3,994.20 : x
  2. Step 2: Convert to fraction form
    11,891.58/17,836.77 = 3,994.20/x
  3. Step 3: Cross multiply
    11,891.58x = 17,836.77 × 3,994.20
  4. Step 4: Simplify right side
    11,891.58x = 71,243,626.73
  5. Step 5: Solve for x
    x = 71,243,626.73/11,891.58
  6. Step 6: Final answer
    x = 5,991.10

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1.5x scale

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.