Home / 20,163.90-27,815.52-11,982.87

Finding the Fourth Proportional to 20,163.90, 27,815.52 and 11,982.87

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Solution

The fourth proportional to 20,163.90, 27,815.52 and 11,982.87 is: 16,530.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,163.90 : 27,815.52 = 11,982.87 : x
  2. Step 2: Convert to fraction form
    20,163.90/27,815.52 = 11,982.87/x
  3. Step 3: Cross multiply
    20,163.90x = 27,815.52 × 11,982.87
  4. Step 4: Simplify right side
    20,163.90x = 333,309,760.14
  5. Step 5: Solve for x
    x = 333,309,760.14/20,163.90
  6. Step 6: Final answer
    x = 16,530.02

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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.