Home / 20,142.28-27,796.38-11,189.80

Finding the Fourth Proportional to 20,142.28, 27,796.38 and 11,189.80

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Solution

The fourth proportional to 20,142.28, 27,796.38 and 11,189.80 is: 15,441.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,142.28 : 27,796.38 = 11,189.80 : x
  2. Step 2: Convert to fraction form
    20,142.28/27,796.38 = 11,189.80/x
  3. Step 3: Cross multiply
    20,142.28x = 27,796.38 × 11,189.80
  4. Step 4: Simplify right side
    20,142.28x = 311,035,932.92
  5. Step 5: Solve for x
    x = 311,035,932.92/20,142.28
  6. Step 6: Final answer
    x = 15,441.94

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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.