Home / 20,115.69-27,761.31-11,163.03

Finding the Fourth Proportional to 20,115.69, 27,761.31 and 11,163.03

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Solution

The fourth proportional to 20,115.69, 27,761.31 and 11,163.03 is: 15,405.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.69 : 27,761.31 = 11,163.03 : x
  2. Step 2: Convert to fraction form
    20,115.69/27,761.31 = 11,163.03/x
  3. Step 3: Cross multiply
    20,115.69x = 27,761.31 × 11,163.03
  4. Step 4: Simplify right side
    20,115.69x = 309,900,336.37
  5. Step 5: Solve for x
    x = 309,900,336.37/20,115.69
  6. Step 6: Final answer
    x = 15,405.90

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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.