Home / 20,190.75-30,286.40-6,339.75

Finding the Fourth Proportional to 20,190.75, 30,286.40 and 6,339.75

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Solution

The fourth proportional to 20,190.75, 30,286.40 and 6,339.75 is: 9,509.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.75 : 30,286.40 = 6,339.75 : x
  2. Step 2: Convert to fraction form
    20,190.75/30,286.40 = 6,339.75/x
  3. Step 3: Cross multiply
    20,190.75x = 30,286.40 × 6,339.75
  4. Step 4: Simplify right side
    20,190.75x = 192,008,172.70
  5. Step 5: Solve for x
    x = 192,008,172.70/20,190.75
  6. Step 6: Final answer
    x = 9,509.71

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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.