Home / 2,819.36-3,883.62-2,155.09

Finding the Fourth Proportional to 2,819.36, 3,883.62 and 2,155.09

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Solution

The fourth proportional to 2,819.36, 3,883.62 and 2,155.09 is: 2,968.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,819.36 : 3,883.62 = 2,155.09 : x
  2. Step 2: Convert to fraction form
    2,819.36/3,883.62 = 2,155.09/x
  3. Step 3: Cross multiply
    2,819.36x = 3,883.62 × 2,155.09
  4. Step 4: Simplify right side
    2,819.36x = 8,369,540.92
  5. Step 5: Solve for x
    x = 8,369,540.92/2,819.36
  6. Step 6: Final answer
    x = 2,968.60

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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.