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Finding the Fourth Proportional to 36,912.78, 50,939.28 and 20,145.78

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Solution

The fourth proportional to 36,912.78, 50,939.28 and 20,145.78 is: 27,800.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,912.78 : 50,939.28 = 20,145.78 : x
  2. Step 2: Convert to fraction form
    36,912.78/50,939.28 = 20,145.78/x
  3. Step 3: Cross multiply
    36,912.78x = 50,939.28 × 20,145.78
  4. Step 4: Simplify right side
    36,912.78x = 1,026,211,528.24
  5. Step 5: Solve for x
    x = 1,026,211,528.24/36,912.78
  6. Step 6: Final answer
    x = 27,800.98

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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.