Home / 13,418.82-20,208.59-12,221.73

Finding the Fourth Proportional to 13,418.82, 20,208.59 and 12,221.73

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Solution

The fourth proportional to 13,418.82, 20,208.59 and 12,221.73 is: 18,405.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,418.82 : 20,208.59 = 12,221.73 : x
  2. Step 2: Convert to fraction form
    13,418.82/20,208.59 = 12,221.73/x
  3. Step 3: Cross multiply
    13,418.82x = 20,208.59 × 12,221.73
  4. Step 4: Simplify right side
    13,418.82x = 246,983,961.22
  5. Step 5: Solve for x
    x = 246,983,961.22/13,418.82
  6. Step 6: Final answer
    x = 18,405.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.