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Finding the Fourth Proportional to 36,906.75, 50,931.36 and 20,139.75

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Solution

The fourth proportional to 36,906.75, 50,931.36 and 20,139.75 is: 27,792.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,906.75 : 50,931.36 = 20,139.75 : x
  2. Step 2: Convert to fraction form
    36,906.75/50,931.36 = 20,139.75/x
  3. Step 3: Cross multiply
    36,906.75x = 50,931.36 × 20,139.75
  4. Step 4: Simplify right side
    36,906.75x = 1,025,744,857.56
  5. Step 5: Solve for x
    x = 1,025,744,857.56/36,906.75
  6. Step 6: Final answer
    x = 27,792.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.