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Finding the Fourth Proportional to 25,879.38, 38,819.07 and 20,660.82

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Solution

The fourth proportional to 25,879.38, 38,819.07 and 20,660.82 is: 30,991.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,879.38 : 38,819.07 = 20,660.82 : x
  2. Step 2: Convert to fraction form
    25,879.38/38,819.07 = 20,660.82/x
  3. Step 3: Cross multiply
    25,879.38x = 38,819.07 × 20,660.82
  4. Step 4: Simplify right side
    25,879.38x = 802,033,817.84
  5. Step 5: Solve for x
    x = 802,033,817.84/25,879.38
  6. Step 6: Final answer
    x = 30,991.23

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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.