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Finding the Fourth Proportional to 20,134.20, 30,201.30 and 12,771.30

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Solution

The fourth proportional to 20,134.20, 30,201.30 and 12,771.30 is: 19,156.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,134.20 : 30,201.30 = 12,771.30 : x
  2. Step 2: Convert to fraction form
    20,134.20/30,201.30 = 12,771.30/x
  3. Step 3: Cross multiply
    20,134.20x = 30,201.30 × 12,771.30
  4. Step 4: Simplify right side
    20,134.20x = 385,709,862.69
  5. Step 5: Solve for x
    x = 385,709,862.69/20,134.20
  6. Step 6: Final answer
    x = 19,156.95

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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.