Home / 20,696.82-31,052.79-12,912.18

Finding the Fourth Proportional to 20,696.82, 31,052.79 and 12,912.18

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Solution

The fourth proportional to 20,696.82, 31,052.79 and 12,912.18 is: 19,372.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,696.82 : 31,052.79 = 12,912.18 : x
  2. Step 2: Convert to fraction form
    20,696.82/31,052.79 = 12,912.18/x
  3. Step 3: Cross multiply
    20,696.82x = 31,052.79 × 12,912.18
  4. Step 4: Simplify right side
    20,696.82x = 400,959,213.98
  5. Step 5: Solve for x
    x = 400,959,213.98/20,696.82
  6. Step 6: Final answer
    x = 19,372.99

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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.