Home / 20,418.80-30,609.24-7,268.72

Finding the Fourth Proportional to 20,418.80, 30,609.24 and 7,268.72

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Solution

The fourth proportional to 20,418.80, 30,609.24 and 7,268.72 is: 10,896.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,418.80 : 30,609.24 = 7,268.72 : x
  2. Step 2: Convert to fraction form
    20,418.80/30,609.24 = 7,268.72/x
  3. Step 3: Cross multiply
    20,418.80x = 30,609.24 × 7,268.72
  4. Step 4: Simplify right side
    20,418.80x = 222,489,994.97
  5. Step 5: Solve for x
    x = 222,489,994.97/20,418.80
  6. Step 6: Final answer
    x = 10,896.33

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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.