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Finding the Fourth Proportional to 20,190.47, 30,286.92 and 6,339.47

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Solution

The fourth proportional to 20,190.47, 30,286.92 and 6,339.47 is: 9,509.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,190.47 : 30,286.92 = 6,339.47 : x
  2. Step 2: Convert to fraction form
    20,190.47/30,286.92 = 6,339.47/x
  3. Step 3: Cross multiply
    20,190.47x = 30,286.92 × 6,339.47
  4. Step 4: Simplify right side
    20,190.47x = 192,002,982.87
  5. Step 5: Solve for x
    x = 192,002,982.87/20,190.47
  6. Step 6: Final answer
    x = 9,509.59

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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.