Home / 3,081.26-4,252.67-2,978.74

Finding the Fourth Proportional to 3,081.26, 4,252.67 and 2,978.74

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Solution

The fourth proportional to 3,081.26, 4,252.67 and 2,978.74 is: 4,111.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,081.26 : 4,252.67 = 2,978.74 : x
  2. Step 2: Convert to fraction form
    3,081.26/4,252.67 = 2,978.74/x
  3. Step 3: Cross multiply
    3,081.26x = 4,252.67 × 2,978.74
  4. Step 4: Simplify right side
    3,081.26x = 12,667,599.83
  5. Step 5: Solve for x
    x = 12,667,599.83/3,081.26
  6. Step 6: Final answer
    x = 4,111.18

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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.