Home / 2,161.38-2,981.28-1,997.34

Finding the Fourth Proportional to 2,161.38, 2,981.28 and 1,997.34

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Solution

The fourth proportional to 2,161.38, 2,981.28 and 1,997.34 is: 2,755.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,161.38 : 2,981.28 = 1,997.34 : x
  2. Step 2: Convert to fraction form
    2,161.38/2,981.28 = 1,997.34/x
  3. Step 3: Cross multiply
    2,161.38x = 2,981.28 × 1,997.34
  4. Step 4: Simplify right side
    2,161.38x = 5,954,629.80
  5. Step 5: Solve for x
    x = 5,954,629.80/2,161.38
  6. Step 6: Final answer
    x = 2,755.01

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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.