Home / 20,150.82-30,221.64-7,666.38

Finding the Fourth Proportional to 20,150.82, 30,221.64 and 7,666.38

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Solution

The fourth proportional to 20,150.82, 30,221.64 and 7,666.38 is: 11,497.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,150.82 : 30,221.64 = 7,666.38 : x
  2. Step 2: Convert to fraction form
    20,150.82/30,221.64 = 7,666.38/x
  3. Step 3: Cross multiply
    20,150.82x = 30,221.64 × 7,666.38
  4. Step 4: Simplify right side
    20,150.82x = 231,690,576.46
  5. Step 5: Solve for x
    x = 231,690,576.46/20,150.82
  6. Step 6: Final answer
    x = 11,497.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.