Home / 20,911.92-31,361.25-6,868.68

Finding the Fourth Proportional to 20,911.92, 31,361.25 and 6,868.68

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Solution

The fourth proportional to 20,911.92, 31,361.25 and 6,868.68 is: 10,300.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,911.92 : 31,361.25 = 6,868.68 : x
  2. Step 2: Convert to fraction form
    20,911.92/31,361.25 = 6,868.68/x
  3. Step 3: Cross multiply
    20,911.92x = 31,361.25 × 6,868.68
  4. Step 4: Simplify right side
    20,911.92x = 215,410,390.65
  5. Step 5: Solve for x
    x = 215,410,390.65/20,911.92
  6. Step 6: Final answer
    x = 10,300.84

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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.