Home / 2,821.13-3,893.57-1,642.85

Finding the Fourth Proportional to 2,821.13, 3,893.57 and 1,642.85

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Solution

The fourth proportional to 2,821.13, 3,893.57 and 1,642.85 is: 2,267.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.13 : 3,893.57 = 1,642.85 : x
  2. Step 2: Convert to fraction form
    2,821.13/3,893.57 = 1,642.85/x
  3. Step 3: Cross multiply
    2,821.13x = 3,893.57 × 1,642.85
  4. Step 4: Simplify right side
    2,821.13x = 6,396,551.47
  5. Step 5: Solve for x
    x = 6,396,551.47/2,821.13
  6. Step 6: Final answer
    x = 2,267.37

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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.