Home / 2,821.68-3,893.76-1,579.68

Finding the Fourth Proportional to 2,821.68, 3,893.76 and 1,579.68

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Solution

The fourth proportional to 2,821.68, 3,893.76 and 1,579.68 is: 2,179.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.68 : 3,893.76 = 1,579.68 : x
  2. Step 2: Convert to fraction form
    2,821.68/3,893.76 = 1,579.68/x
  3. Step 3: Cross multiply
    2,821.68x = 3,893.76 × 1,579.68
  4. Step 4: Simplify right side
    2,821.68x = 6,150,894.80
  5. Step 5: Solve for x
    x = 6,150,894.80/2,821.68
  6. Step 6: Final answer
    x = 2,179.87

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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.