Home / 3,127.25-4,315.74-2,381.78

Finding the Fourth Proportional to 3,127.25, 4,315.74 and 2,381.78

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Solution

The fourth proportional to 3,127.25, 4,315.74 and 2,381.78 is: 3,286.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,127.25 : 4,315.74 = 2,381.78 : x
  2. Step 2: Convert to fraction form
    3,127.25/4,315.74 = 2,381.78/x
  3. Step 3: Cross multiply
    3,127.25x = 4,315.74 × 2,381.78
  4. Step 4: Simplify right side
    3,127.25x = 10,279,143.22
  5. Step 5: Solve for x
    x = 10,279,143.22/3,127.25
  6. Step 6: Final answer
    x = 3,286.96

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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.