Home / 3,100.61-4,279.68-1,921.03

Finding the Fourth Proportional to 3,100.61, 4,279.68 and 1,921.03

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Solution

The fourth proportional to 3,100.61, 4,279.68 and 1,921.03 is: 2,651.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,100.61 : 4,279.68 = 1,921.03 : x
  2. Step 2: Convert to fraction form
    3,100.61/4,279.68 = 1,921.03/x
  3. Step 3: Cross multiply
    3,100.61x = 4,279.68 × 1,921.03
  4. Step 4: Simplify right side
    3,100.61x = 8,221,382.97
  5. Step 5: Solve for x
    x = 8,221,382.97/3,100.61
  6. Step 6: Final answer
    x = 2,651.54

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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.