Home / 12,213.41-18,321.42-3,891.47

Finding the Fourth Proportional to 12,213.41, 18,321.42 and 3,891.47

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Solution

The fourth proportional to 12,213.41, 18,321.42 and 3,891.47 is: 5,837.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.41 : 18,321.42 = 3,891.47 : x
  2. Step 2: Convert to fraction form
    12,213.41/18,321.42 = 3,891.47/x
  3. Step 3: Cross multiply
    12,213.41x = 18,321.42 × 3,891.47
  4. Step 4: Simplify right side
    12,213.41x = 71,297,164.68
  5. Step 5: Solve for x
    x = 71,297,164.68/12,213.41
  6. Step 6: Final answer
    x = 5,837.62

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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.