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Finding the Fourth Proportional to 20,195.95, 30,311.43 and 20,149.25

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Solution

The fourth proportional to 20,195.95, 30,311.43 and 20,149.25 is: 30,241.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,195.95 : 30,311.43 = 20,149.25 : x
  2. Step 2: Convert to fraction form
    20,195.95/30,311.43 = 20,149.25/x
  3. Step 3: Cross multiply
    20,195.95x = 30,311.43 × 20,149.25
  4. Step 4: Simplify right side
    20,195.95x = 610,752,580.93
  5. Step 5: Solve for x
    x = 610,752,580.93/20,195.95
  6. Step 6: Final answer
    x = 30,241.34

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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.