Home / 20,377.35-28,121.28-11,424.60

Finding the Fourth Proportional to 20,377.35, 28,121.28 and 11,424.60

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Solution

The fourth proportional to 20,377.35, 28,121.28 and 11,424.60 is: 15,766.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,377.35 : 28,121.28 = 11,424.60 : x
  2. Step 2: Convert to fraction form
    20,377.35/28,121.28 = 11,424.60/x
  3. Step 3: Cross multiply
    20,377.35x = 28,121.28 × 11,424.60
  4. Step 4: Simplify right side
    20,377.35x = 321,274,375.49
  5. Step 5: Solve for x
    x = 321,274,375.49/20,377.35
  6. Step 6: Final answer
    x = 15,766.25

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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.