Home / 2,813.82-3,873.99-2,315.60

Finding the Fourth Proportional to 2,813.82, 3,873.99 and 2,315.60

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Solution

The fourth proportional to 2,813.82, 3,873.99 and 2,315.60 is: 3,188.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,813.82 : 3,873.99 = 2,315.60 : x
  2. Step 2: Convert to fraction form
    2,813.82/3,873.99 = 2,315.60/x
  3. Step 3: Cross multiply
    2,813.82x = 3,873.99 × 2,315.60
  4. Step 4: Simplify right side
    2,813.82x = 8,970,636.88
  5. Step 5: Solve for x
    x = 8,970,636.88/2,813.82
  6. Step 6: Final answer
    x = 3,188.06

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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.