Home / 20,183.80-30,278.40-7,040.20

Finding the Fourth Proportional to 20,183.80, 30,278.40 and 7,040.20

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Solution

The fourth proportional to 20,183.80, 30,278.40 and 7,040.20 is: 10,561.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,183.80 : 30,278.40 = 7,040.20 : x
  2. Step 2: Convert to fraction form
    20,183.80/30,278.40 = 7,040.20/x
  3. Step 3: Cross multiply
    20,183.80x = 30,278.40 × 7,040.20
  4. Step 4: Simplify right side
    20,183.80x = 213,165,991.68
  5. Step 5: Solve for x
    x = 213,165,991.68/20,183.80
  6. Step 6: Final answer
    x = 10,561.24

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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.