Home / 20,936.72-31,411.19-8,450.37

Finding the Fourth Proportional to 20,936.72, 31,411.19 and 8,450.37

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Solution

The fourth proportional to 20,936.72, 31,411.19 and 8,450.37 is: 12,678.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.72 : 31,411.19 = 8,450.37 : x
  2. Step 2: Convert to fraction form
    20,936.72/31,411.19 = 8,450.37/x
  3. Step 3: Cross multiply
    20,936.72x = 31,411.19 × 8,450.37
  4. Step 4: Simplify right side
    20,936.72x = 265,436,198.77
  5. Step 5: Solve for x
    x = 265,436,198.77/20,936.72
  6. Step 6: Final answer
    x = 12,678.02

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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.