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Finding the Fourth Proportional to 40,682.20, 60,974.70 and 20,950.60

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Solution

The fourth proportional to 40,682.20, 60,974.70 and 20,950.60 is: 31,400.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,682.20 : 60,974.70 = 20,950.60 : x
  2. Step 2: Convert to fraction form
    40,682.20/60,974.70 = 20,950.60/x
  3. Step 3: Cross multiply
    40,682.20x = 60,974.70 × 20,950.60
  4. Step 4: Simplify right side
    40,682.20x = 1,277,456,549.82
  5. Step 5: Solve for x
    x = 1,277,456,549.82/40,682.20
  6. Step 6: Final answer
    x = 31,400.87

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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.