Home / 4,121.78-5,685.86-3,125.41

Finding the Fourth Proportional to 4,121.78, 5,685.86 and 3,125.41

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Solution

The fourth proportional to 4,121.78, 5,685.86 and 3,125.41 is: 4,311.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,121.78 : 5,685.86 = 3,125.41 : x
  2. Step 2: Convert to fraction form
    4,121.78/5,685.86 = 3,125.41/x
  3. Step 3: Cross multiply
    4,121.78x = 5,685.86 × 3,125.41
  4. Step 4: Simplify right side
    4,121.78x = 17,770,643.70
  5. Step 5: Solve for x
    x = 17,770,643.70/4,121.78
  6. Step 6: Final answer
    x = 4,311.40

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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.