Home / 2,187.36-3,282.12-1,213.74

Finding the Fourth Proportional to 2,187.36, 3,282.12 and 1,213.74

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Solution

The fourth proportional to 2,187.36, 3,282.12 and 1,213.74 is: 1,821.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.36 : 3,282.12 = 1,213.74 : x
  2. Step 2: Convert to fraction form
    2,187.36/3,282.12 = 1,213.74/x
  3. Step 3: Cross multiply
    2,187.36x = 3,282.12 × 1,213.74
  4. Step 4: Simplify right side
    2,187.36x = 3,983,640.33
  5. Step 5: Solve for x
    x = 3,983,640.33/2,187.36
  6. Step 6: Final answer
    x = 1,821.21

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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.