Home / 3,964.55-5,471.17-2,172.20

Finding the Fourth Proportional to 3,964.55, 5,471.17 and 2,172.20

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Solution

The fourth proportional to 3,964.55, 5,471.17 and 2,172.20 is: 2,997.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,964.55 : 5,471.17 = 2,172.20 : x
  2. Step 2: Convert to fraction form
    3,964.55/5,471.17 = 2,172.20/x
  3. Step 3: Cross multiply
    3,964.55x = 5,471.17 × 2,172.20
  4. Step 4: Simplify right side
    3,964.55x = 11,884,475.47
  5. Step 5: Solve for x
    x = 11,884,475.47/3,964.55
  6. Step 6: Final answer
    x = 2,997.69

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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.