Home / 12,213.70-18,321.88-3,891.76

Finding the Fourth Proportional to 12,213.70, 18,321.88 and 3,891.76

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Solution

The fourth proportional to 12,213.70, 18,321.88 and 3,891.76 is: 5,838.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,213.70 : 18,321.88 = 3,891.76 : x
  2. Step 2: Convert to fraction form
    12,213.70/18,321.88 = 3,891.76/x
  3. Step 3: Cross multiply
    12,213.70x = 18,321.88 × 3,891.76
  4. Step 4: Simplify right side
    12,213.70x = 71,304,359.71
  5. Step 5: Solve for x
    x = 71,304,359.71/12,213.70
  6. Step 6: Final answer
    x = 5,838.06

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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.