Home / 20,872.49-31,309.34-6,081.08

Finding the Fourth Proportional to 20,872.49, 31,309.34 and 6,081.08

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Solution

The fourth proportional to 20,872.49, 31,309.34 and 6,081.08 is: 9,121.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.49 : 31,309.34 = 6,081.08 : x
  2. Step 2: Convert to fraction form
    20,872.49/31,309.34 = 6,081.08/x
  3. Step 3: Cross multiply
    20,872.49x = 31,309.34 × 6,081.08
  4. Step 4: Simplify right side
    20,872.49x = 190,394,414.34
  5. Step 5: Solve for x
    x = 190,394,414.34/20,872.49
  6. Step 6: Final answer
    x = 9,121.79

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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.