Home / 21,166.82-31,728.00-7,121.97

Finding the Fourth Proportional to 21,166.82, 31,728.00 and 7,121.97

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Solution

The fourth proportional to 21,166.82, 31,728.00 and 7,121.97 is: 10,675.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,166.82 : 31,728.00 = 7,121.97 : x
  2. Step 2: Convert to fraction form
    21,166.82/31,728.00 = 7,121.97/x
  3. Step 3: Cross multiply
    21,166.82x = 31,728.00 × 7,121.97
  4. Step 4: Simplify right side
    21,166.82x = 225,965,791.32
  5. Step 5: Solve for x
    x = 225,965,791.32/21,166.82
  6. Step 6: Final answer
    x = 10,675.47

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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.