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Finding the Fourth Proportional to 36,855.31, 50,860.35 and 20,939.80

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Solution

The fourth proportional to 36,855.31, 50,860.35 and 20,939.80 is: 28,896.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    36,855.31 : 50,860.35 = 20,939.80 : x
  2. Step 2: Convert to fraction form
    36,855.31/50,860.35 = 20,939.80/x
  3. Step 3: Cross multiply
    36,855.31x = 50,860.35 × 20,939.80
  4. Step 4: Simplify right side
    36,855.31x = 1,065,005,556.93
  5. Step 5: Solve for x
    x = 1,065,005,556.93/36,855.31
  6. Step 6: Final answer
    x = 28,896.94

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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.