Home / 2,997.81-4,137.37-2,161.28

Finding the Fourth Proportional to 2,997.81, 4,137.37 and 2,161.28

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Solution

The fourth proportional to 2,997.81, 4,137.37 and 2,161.28 is: 2,982.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,997.81 : 4,137.37 = 2,161.28 : x
  2. Step 2: Convert to fraction form
    2,997.81/4,137.37 = 2,161.28/x
  3. Step 3: Cross multiply
    2,997.81x = 4,137.37 × 2,161.28
  4. Step 4: Simplify right side
    2,997.81x = 8,942,019.97
  5. Step 5: Solve for x
    x = 8,942,019.97/2,997.81
  6. Step 6: Final answer
    x = 2,982.85

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.