Home / 3,100.24-4,279.13-1,920.61

Finding the Fourth Proportional to 3,100.24, 4,279.13 and 1,920.61

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Solution

The fourth proportional to 3,100.24, 4,279.13 and 1,920.61 is: 2,650.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.24 : 4,279.13 = 1,920.61 : x
  2. Step 2: Convert to fraction form
    3,100.24/4,279.13 = 1,920.61/x
  3. Step 3: Cross multiply
    3,100.24x = 4,279.13 × 1,920.61
  4. Step 4: Simplify right side
    3,100.24x = 8,218,539.87
  5. Step 5: Solve for x
    x = 8,218,539.87/3,100.24
  6. Step 6: Final answer
    x = 2,650.94

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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.