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Finding the Fourth Proportional to 20,620.20, 30,933.81 and 8,133.69

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Solution

The fourth proportional to 20,620.20, 30,933.81 and 8,133.69 is: 12,201.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.20 : 30,933.81 = 8,133.69 : x
  2. Step 2: Convert to fraction form
    20,620.20/30,933.81 = 8,133.69/x
  3. Step 3: Cross multiply
    20,620.20x = 30,933.81 × 8,133.69
  4. Step 4: Simplify right side
    20,620.20x = 251,606,021.06
  5. Step 5: Solve for x
    x = 251,606,021.06/20,620.20
  6. Step 6: Final answer
    x = 12,201.92

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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.