Home / 3,620.88-4,996.80-2,128.77

Finding the Fourth Proportional to 3,620.88, 4,996.80 and 2,128.77

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Solution

The fourth proportional to 3,620.88, 4,996.80 and 2,128.77 is: 2,937.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.88 : 4,996.80 = 2,128.77 : x
  2. Step 2: Convert to fraction form
    3,620.88/4,996.80 = 2,128.77/x
  3. Step 3: Cross multiply
    3,620.88x = 4,996.80 × 2,128.77
  4. Step 4: Simplify right side
    3,620.88x = 10,637,037.94
  5. Step 5: Solve for x
    x = 10,637,037.94/3,620.88
  6. Step 6: Final answer
    x = 2,937.69

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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.