Home / 20,758.75-31,138.67-6,907.75

Finding the Fourth Proportional to 20,758.75, 31,138.67 and 6,907.75

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Solution

The fourth proportional to 20,758.75, 31,138.67 and 6,907.75 is: 10,361.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,758.75 : 31,138.67 = 6,907.75 : x
  2. Step 2: Convert to fraction form
    20,758.75/31,138.67 = 6,907.75/x
  3. Step 3: Cross multiply
    20,758.75x = 31,138.67 × 6,907.75
  4. Step 4: Simplify right side
    20,758.75x = 215,098,147.69
  5. Step 5: Solve for x
    x = 215,098,147.69/20,758.75
  6. Step 6: Final answer
    x = 10,361.81

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1.5x scale

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.