Home / 20,145.76-27,786.06-12,177.79

Finding the Fourth Proportional to 20,145.76, 27,786.06 and 12,177.79

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Solution

The fourth proportional to 20,145.76, 27,786.06 and 12,177.79 is: 16,796.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,145.76 : 27,786.06 = 12,177.79 : x
  2. Step 2: Convert to fraction form
    20,145.76/27,786.06 = 12,177.79/x
  3. Step 3: Cross multiply
    20,145.76x = 27,786.06 × 12,177.79
  4. Step 4: Simplify right side
    20,145.76x = 338,372,924.69
  5. Step 5: Solve for x
    x = 338,372,924.69/20,145.76
  6. Step 6: Final answer
    x = 16,796.23

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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.