Home / 20,151.88-27,811.31-11,199.15

Finding the Fourth Proportional to 20,151.88, 27,811.31 and 11,199.15

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Solution

The fourth proportional to 20,151.88, 27,811.31 and 11,199.15 is: 15,455.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,151.88 : 27,811.31 = 11,199.15 : x
  2. Step 2: Convert to fraction form
    20,151.88/27,811.31 = 11,199.15/x
  3. Step 3: Cross multiply
    20,151.88x = 27,811.31 × 11,199.15
  4. Step 4: Simplify right side
    20,151.88x = 311,462,976.39
  5. Step 5: Solve for x
    x = 311,462,976.39/20,151.88
  6. Step 6: Final answer
    x = 15,455.78

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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.