Home / 20,616.11-30,903.38-8,131.31

Finding the Fourth Proportional to 20,616.11, 30,903.38 and 8,131.31

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Solution

The fourth proportional to 20,616.11, 30,903.38 and 8,131.31 is: 12,188.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,616.11 : 30,903.38 = 8,131.31 : x
  2. Step 2: Convert to fraction form
    20,616.11/30,903.38 = 8,131.31/x
  3. Step 3: Cross multiply
    20,616.11x = 30,903.38 × 8,131.31
  4. Step 4: Simplify right side
    20,616.11x = 251,284,767.65
  5. Step 5: Solve for x
    x = 251,284,767.65/20,616.11
  6. Step 6: Final answer
    x = 12,188.76

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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.