Home / 2,821.20-3,893.97-1,878.57

Finding the Fourth Proportional to 2,821.20, 3,893.97 and 1,878.57

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Solution

The fourth proportional to 2,821.20, 3,893.97 and 1,878.57 is: 2,592.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,821.20 : 3,893.97 = 1,878.57 : x
  2. Step 2: Convert to fraction form
    2,821.20/3,893.97 = 1,878.57/x
  3. Step 3: Cross multiply
    2,821.20x = 3,893.97 × 1,878.57
  4. Step 4: Simplify right side
    2,821.20x = 7,315,095.22
  5. Step 5: Solve for x
    x = 7,315,095.22/2,821.20
  6. Step 6: Final answer
    x = 2,592.90

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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.