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Finding the Fourth Proportional to 11,891.58, 17,838.12 and 3,993.48

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Solution

The fourth proportional to 11,891.58, 17,838.12 and 3,993.48 is: 5,990.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,891.58 : 17,838.12 = 3,993.48 : x
  2. Step 2: Convert to fraction form
    11,891.58/17,838.12 = 3,993.48/x
  3. Step 3: Cross multiply
    11,891.58x = 17,838.12 × 3,993.48
  4. Step 4: Simplify right side
    11,891.58x = 71,236,140.26
  5. Step 5: Solve for x
    x = 71,236,140.26/11,891.58
  6. Step 6: Final answer
    x = 5,990.47

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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.