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Finding the Fourth Proportional to 20,190.50, 30,286.97 and 6,339.50

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Solution

The fourth proportional to 20,190.50, 30,286.97 and 6,339.50 is: 9,509.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.50 : 30,286.97 = 6,339.50 : x
  2. Step 2: Convert to fraction form
    20,190.50/30,286.97 = 6,339.50/x
  3. Step 3: Cross multiply
    20,190.50x = 30,286.97 × 6,339.50
  4. Step 4: Simplify right side
    20,190.50x = 192,004,214.62
  5. Step 5: Solve for x
    x = 192,004,214.62/20,190.50
  6. Step 6: Final answer
    x = 9,509.63

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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.