Home / 20,120.38-27,764.78-12,166.99

Finding the Fourth Proportional to 20,120.38, 27,764.78 and 12,166.99

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Solution

The fourth proportional to 20,120.38, 27,764.78 and 12,166.99 is: 16,789.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,120.38 : 27,764.78 = 12,166.99 : x
  2. Step 2: Convert to fraction form
    20,120.38/27,764.78 = 12,166.99/x
  3. Step 3: Cross multiply
    20,120.38x = 27,764.78 × 12,166.99
  4. Step 4: Simplify right side
    20,120.38x = 337,813,670.37
  5. Step 5: Solve for x
    x = 337,813,670.37/20,120.38
  6. Step 6: Final answer
    x = 16,789.63

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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.