Home / 20,163.87-27,825.99-11,211.20

Finding the Fourth Proportional to 20,163.87, 27,825.99 and 11,211.20

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Solution

The fourth proportional to 20,163.87, 27,825.99 and 11,211.20 is: 15,471.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.87 : 27,825.99 = 11,211.20 : x
  2. Step 2: Convert to fraction form
    20,163.87/27,825.99 = 11,211.20/x
  3. Step 3: Cross multiply
    20,163.87x = 27,825.99 × 11,211.20
  4. Step 4: Simplify right side
    20,163.87x = 311,962,739.09
  5. Step 5: Solve for x
    x = 311,962,739.09/20,163.87
  6. Step 6: Final answer
    x = 15,471.37

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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.