Home / 3,620.85-4,996.86-2,128.85

Finding the Fourth Proportional to 3,620.85, 4,996.86 and 2,128.85

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Solution

The fourth proportional to 3,620.85, 4,996.86 and 2,128.85 is: 2,937.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.85 : 4,996.86 = 2,128.85 : x
  2. Step 2: Convert to fraction form
    3,620.85/4,996.86 = 2,128.85/x
  3. Step 3: Cross multiply
    3,620.85x = 4,996.86 × 2,128.85
  4. Step 4: Simplify right side
    3,620.85x = 10,637,540.43
  5. Step 5: Solve for x
    x = 10,637,540.43/3,620.85
  6. Step 6: Final answer
    x = 2,937.86

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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.