Home / 20,201.58-27,882.78-13,115.70

Finding the Fourth Proportional to 20,201.58, 27,882.78 and 13,115.70

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Solution

The fourth proportional to 20,201.58, 27,882.78 and 13,115.70 is: 18,102.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,201.58 : 27,882.78 = 13,115.70 : x
  2. Step 2: Convert to fraction form
    20,201.58/27,882.78 = 13,115.70/x
  3. Step 3: Cross multiply
    20,201.58x = 27,882.78 × 13,115.70
  4. Step 4: Simplify right side
    20,201.58x = 365,702,177.65
  5. Step 5: Solve for x
    x = 365,702,177.65/20,201.58
  6. Step 6: Final answer
    x = 18,102.65

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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.