Home / 3,111.75-4,281.48-2,690.73

Finding the Fourth Proportional to 3,111.75, 4,281.48 and 2,690.73

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Solution

The fourth proportional to 3,111.75, 4,281.48 and 2,690.73 is: 3,702.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,111.75 : 4,281.48 = 2,690.73 : x
  2. Step 2: Convert to fraction form
    3,111.75/4,281.48 = 2,690.73/x
  3. Step 3: Cross multiply
    3,111.75x = 4,281.48 × 2,690.73
  4. Step 4: Simplify right side
    3,111.75x = 11,520,306.68
  5. Step 5: Solve for x
    x = 11,520,306.68/3,111.75
  6. Step 6: Final answer
    x = 3,702.20

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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.