Home / 12,213.56-18,321.68-3,891.63

Finding the Fourth Proportional to 12,213.56, 18,321.68 and 3,891.63

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Solution

The fourth proportional to 12,213.56, 18,321.68 and 3,891.63 is: 5,837.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.56 : 18,321.68 = 3,891.63 : x
  2. Step 2: Convert to fraction form
    12,213.56/18,321.68 = 3,891.63/x
  3. Step 3: Cross multiply
    12,213.56x = 18,321.68 × 3,891.63
  4. Step 4: Simplify right side
    12,213.56x = 71,301,180.08
  5. Step 5: Solve for x
    x = 71,301,180.08/12,213.56
  6. Step 6: Final answer
    x = 5,837.87

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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.