Home / 20,972.82-31,449.30-7,636.38

Finding the Fourth Proportional to 20,972.82, 31,449.30 and 7,636.38

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Solution

The fourth proportional to 20,972.82, 31,449.30 and 7,636.38 is: 11,450.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,972.82 : 31,449.30 = 7,636.38 : x
  2. Step 2: Convert to fraction form
    20,972.82/31,449.30 = 7,636.38/x
  3. Step 3: Cross multiply
    20,972.82x = 31,449.30 × 7,636.38
  4. Step 4: Simplify right side
    20,972.82x = 240,158,658.96
  5. Step 5: Solve for x
    x = 240,158,658.96/20,972.82
  6. Step 6: Final answer
    x = 11,450.95

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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.