Home / 20,249.28-27,939.36-12,290.88

Finding the Fourth Proportional to 20,249.28, 27,939.36 and 12,290.88

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Solution

The fourth proportional to 20,249.28, 27,939.36 and 12,290.88 is: 16,958.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,249.28 : 27,939.36 = 12,290.88 : x
  2. Step 2: Convert to fraction form
    20,249.28/27,939.36 = 12,290.88/x
  3. Step 3: Cross multiply
    20,249.28x = 27,939.36 × 12,290.88
  4. Step 4: Simplify right side
    20,249.28x = 343,399,321.04
  5. Step 5: Solve for x
    x = 343,399,321.04/20,249.28
  6. Step 6: Final answer
    x = 16,958.59

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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.