Home / 13,738.68-20,608.38-3,879

Finding the Fourth Proportional to 13,738.68, 20,608.38 and 3,879

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Solution

The fourth proportional to 13,738.68, 20,608.38 and 3,879 is: 5,818.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,738.68 : 20,608.38 = 3,879 : x
  2. Step 2: Convert to fraction form
    13,738.68/20,608.38 = 3,879/x
  3. Step 3: Cross multiply
    13,738.68x = 20,608.38 × 3,879
  4. Step 4: Simplify right side
    13,738.68x = 79,939,906.02
  5. Step 5: Solve for x
    x = 79,939,906.02/13,738.68
  6. Step 6: Final answer
    x = 5,818.60

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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.