Home / 20,377.19-28,121.22-11,424.80

Finding the Fourth Proportional to 20,377.19, 28,121.22 and 11,424.80

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Solution

The fourth proportional to 20,377.19, 28,121.22 and 11,424.80 is: 15,766.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.19 : 28,121.22 = 11,424.80 : x
  2. Step 2: Convert to fraction form
    20,377.19/28,121.22 = 11,424.80/x
  3. Step 3: Cross multiply
    20,377.19x = 28,121.22 × 11,424.80
  4. Step 4: Simplify right side
    20,377.19x = 321,279,173.65
  5. Step 5: Solve for x
    x = 321,279,173.65/20,377.19
  6. Step 6: Final answer
    x = 15,766.61

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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.