Home / 20,191.28-27,858.38-12,122.88

Finding the Fourth Proportional to 20,191.28, 27,858.38 and 12,122.88

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Solution

The fourth proportional to 20,191.28, 27,858.38 and 12,122.88 is: 16,726.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,191.28 : 27,858.38 = 12,122.88 : x
  2. Step 2: Convert to fraction form
    20,191.28/27,858.38 = 12,122.88/x
  3. Step 3: Cross multiply
    20,191.28x = 27,858.38 × 12,122.88
  4. Step 4: Simplify right side
    20,191.28x = 337,723,797.73
  5. Step 5: Solve for x
    x = 337,723,797.73/20,191.28
  6. Step 6: Final answer
    x = 16,726.22

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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.