Home / 3,913.21-5,400.20-2,144.81

Finding the Fourth Proportional to 3,913.21, 5,400.20 and 2,144.81

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Solution

The fourth proportional to 3,913.21, 5,400.20 and 2,144.81 is: 2,959.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.21 : 5,400.20 = 2,144.81 : x
  2. Step 2: Convert to fraction form
    3,913.21/5,400.20 = 2,144.81/x
  3. Step 3: Cross multiply
    3,913.21x = 5,400.20 × 2,144.81
  4. Step 4: Simplify right side
    3,913.21x = 11,582,402.96
  5. Step 5: Solve for x
    x = 11,582,402.96/3,913.21
  6. Step 6: Final answer
    x = 2,959.82

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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.