Home / 12,021.80-18,034.20-4,122.16

Finding the Fourth Proportional to 12,021.80, 18,034.20 and 4,122.16

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Solution

The fourth proportional to 12,021.80, 18,034.20 and 4,122.16 is: 6,183.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,021.80 : 18,034.20 = 4,122.16 : x
  2. Step 2: Convert to fraction form
    12,021.80/18,034.20 = 4,122.16/x
  3. Step 3: Cross multiply
    12,021.80x = 18,034.20 × 4,122.16
  4. Step 4: Simplify right side
    12,021.80x = 74,339,857.87
  5. Step 5: Solve for x
    x = 74,339,857.87/12,021.80
  6. Step 6: Final answer
    x = 6,183.75

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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.