Home / 20,089.68-27,721.20-11,137.11

Finding the Fourth Proportional to 20,089.68, 27,721.20 and 11,137.11

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Solution

The fourth proportional to 20,089.68, 27,721.20 and 11,137.11 is: 15,367.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,089.68 : 27,721.20 = 11,137.11 : x
  2. Step 2: Convert to fraction form
    20,089.68/27,721.20 = 11,137.11/x
  3. Step 3: Cross multiply
    20,089.68x = 27,721.20 × 11,137.11
  4. Step 4: Simplify right side
    20,089.68x = 308,734,053.73
  5. Step 5: Solve for x
    x = 308,734,053.73/20,089.68
  6. Step 6: Final answer
    x = 15,367.79

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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.