Home / 20,795.20-31,144.20-20,377.60

Finding the Fourth Proportional to 20,795.20, 31,144.20 and 20,377.60

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Solution

The fourth proportional to 20,795.20, 31,144.20 and 20,377.60 is: 30,518.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,795.20 : 31,144.20 = 20,377.60 : x
  2. Step 2: Convert to fraction form
    20,795.20/31,144.20 = 20,377.60/x
  3. Step 3: Cross multiply
    20,795.20x = 31,144.20 × 20,377.60
  4. Step 4: Simplify right side
    20,795.20x = 634,644,049.92
  5. Step 5: Solve for x
    x = 634,644,049.92/20,795.20
  6. Step 6: Final answer
    x = 30,518.78

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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.