Home / 2,122.16-3,190.56-1,961.80

Finding the Fourth Proportional to 2,122.16, 3,190.56 and 1,961.80

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Solution

The fourth proportional to 2,122.16, 3,190.56 and 1,961.80 is: 2,949.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,122.16 : 3,190.56 = 1,961.80 : x
  2. Step 2: Convert to fraction form
    2,122.16/3,190.56 = 1,961.80/x
  3. Step 3: Cross multiply
    2,122.16x = 3,190.56 × 1,961.80
  4. Step 4: Simplify right side
    2,122.16x = 6,259,240.61
  5. Step 5: Solve for x
    x = 6,259,240.61/2,122.16
  6. Step 6: Final answer
    x = 2,949.47

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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.