Home / 20,139.14-27,790.49-11,185.88

Finding the Fourth Proportional to 20,139.14, 27,790.49 and 11,185.88

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Solution

The fourth proportional to 20,139.14, 27,790.49 and 11,185.88 is: 15,435.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,139.14 : 27,790.49 = 11,185.88 : x
  2. Step 2: Convert to fraction form
    20,139.14/27,790.49 = 11,185.88/x
  3. Step 3: Cross multiply
    20,139.14x = 27,790.49 × 11,185.88
  4. Step 4: Simplify right side
    20,139.14x = 310,860,891.40
  5. Step 5: Solve for x
    x = 310,860,891.40/20,139.14
  6. Step 6: Final answer
    x = 15,435.66

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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.