Home / 26,879.20-40,286.40-13,724.80

Finding the Fourth Proportional to 26,879.20, 40,286.40 and 13,724.80

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Solution

The fourth proportional to 26,879.20, 40,286.40 and 13,724.80 is: 20,570.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,879.20 : 40,286.40 = 13,724.80 : x
  2. Step 2: Convert to fraction form
    26,879.20/40,286.40 = 13,724.80/x
  3. Step 3: Cross multiply
    26,879.20x = 40,286.40 × 13,724.80
  4. Step 4: Simplify right side
    26,879.20x = 552,922,782.72
  5. Step 5: Solve for x
    x = 552,922,782.72/26,879.20
  6. Step 6: Final answer
    x = 20,570.66

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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.