Home / 3,126.75-4,312.88-2,005.92

Finding the Fourth Proportional to 3,126.75, 4,312.88 and 2,005.92

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Solution

The fourth proportional to 3,126.75, 4,312.88 and 2,005.92 is: 2,766.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,126.75 : 4,312.88 = 2,005.92 : x
  2. Step 2: Convert to fraction form
    3,126.75/4,312.88 = 2,005.92/x
  3. Step 3: Cross multiply
    3,126.75x = 4,312.88 × 2,005.92
  4. Step 4: Simplify right side
    3,126.75x = 8,651,292.25
  5. Step 5: Solve for x
    x = 8,651,292.25/3,126.75
  6. Step 6: Final answer
    x = 2,766.86

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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.