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Finding the Fourth Proportional to 38,195.70, 57,310.74 and 20,644.98

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Solution

The fourth proportional to 38,195.70, 57,310.74 and 20,644.98 is: 30,976.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,195.70 : 57,310.74 = 20,644.98 : x
  2. Step 2: Convert to fraction form
    38,195.70/57,310.74 = 20,644.98/x
  3. Step 3: Cross multiply
    38,195.70x = 57,310.74 × 20,644.98
  4. Step 4: Simplify right side
    38,195.70x = 1,183,179,081.09
  5. Step 5: Solve for x
    x = 1,183,179,081.09/38,195.70
  6. Step 6: Final answer
    x = 30,976.76

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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.