Home / 20,115.54-27,758.97-11,162.88

Finding the Fourth Proportional to 20,115.54, 27,758.97 and 11,162.88

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Solution

The fourth proportional to 20,115.54, 27,758.97 and 11,162.88 is: 15,404.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.54 : 27,758.97 = 11,162.88 : x
  2. Step 2: Convert to fraction form
    20,115.54/27,758.97 = 11,162.88/x
  3. Step 3: Cross multiply
    20,115.54x = 27,758.97 × 11,162.88
  4. Step 4: Simplify right side
    20,115.54x = 309,870,051.03
  5. Step 5: Solve for x
    x = 309,870,051.03/20,115.54
  6. Step 6: Final answer
    x = 15,404.51

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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.