Home / 2,121.24-3,183.12-1,147.32

Finding the Fourth Proportional to 2,121.24, 3,183.12 and 1,147.32

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Solution

The fourth proportional to 2,121.24, 3,183.12 and 1,147.32 is: 1,721.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,121.24 : 3,183.12 = 1,147.32 : x
  2. Step 2: Convert to fraction form
    2,121.24/3,183.12 = 1,147.32/x
  3. Step 3: Cross multiply
    2,121.24x = 3,183.12 × 1,147.32
  4. Step 4: Simplify right side
    2,121.24x = 3,652,057.24
  5. Step 5: Solve for x
    x = 3,652,057.24/2,121.24
  6. Step 6: Final answer
    x = 1,721.66

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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.