Home / 3,121.24-4,682.94-2,638.84

Finding the Fourth Proportional to 3,121.24, 4,682.94 and 2,638.84

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Solution

The fourth proportional to 3,121.24, 4,682.94 and 2,638.84 is: 3,959.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,121.24 : 4,682.94 = 2,638.84 : x
  2. Step 2: Convert to fraction form
    3,121.24/4,682.94 = 2,638.84/x
  3. Step 3: Cross multiply
    3,121.24x = 4,682.94 × 2,638.84
  4. Step 4: Simplify right side
    3,121.24x = 12,357,529.39
  5. Step 5: Solve for x
    x = 12,357,529.39/3,121.24
  6. Step 6: Final answer
    x = 3,959.17

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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.