Home / 20,458.14-28,231.30-11,383.95

Finding the Fourth Proportional to 20,458.14, 28,231.30 and 11,383.95

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Solution

The fourth proportional to 20,458.14, 28,231.30 and 11,383.95 is: 15,709.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.14 : 28,231.30 = 11,383.95 : x
  2. Step 2: Convert to fraction form
    20,458.14/28,231.30 = 11,383.95/x
  3. Step 3: Cross multiply
    20,458.14x = 28,231.30 × 11,383.95
  4. Step 4: Simplify right side
    20,458.14x = 321,383,827.73
  5. Step 5: Solve for x
    x = 321,383,827.73/20,458.14
  6. Step 6: Final answer
    x = 15,709.34

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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.