Home / 20,115.66-27,758.79-11,163.54

Finding the Fourth Proportional to 20,115.66, 27,758.79 and 11,163.54

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Solution

The fourth proportional to 20,115.66, 27,758.79 and 11,163.54 is: 15,405.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.66 : 27,758.79 = 11,163.54 : x
  2. Step 2: Convert to fraction form
    20,115.66/27,758.79 = 11,163.54/x
  3. Step 3: Cross multiply
    20,115.66x = 27,758.79 × 11,163.54
  4. Step 4: Simplify right side
    20,115.66x = 309,886,362.52
  5. Step 5: Solve for x
    x = 309,886,362.52/20,115.66
  6. Step 6: Final answer
    x = 15,405.23

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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.