Home / 2,825.30-3,896.96-1,987.76

Finding the Fourth Proportional to 2,825.30, 3,896.96 and 1,987.76

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Solution

The fourth proportional to 2,825.30, 3,896.96 and 1,987.76 is: 2,741.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,825.30 : 3,896.96 = 1,987.76 : x
  2. Step 2: Convert to fraction form
    2,825.30/3,896.96 = 1,987.76/x
  3. Step 3: Cross multiply
    2,825.30x = 3,896.96 × 1,987.76
  4. Step 4: Simplify right side
    2,825.30x = 7,746,221.21
  5. Step 5: Solve for x
    x = 7,746,221.21/2,825.30
  6. Step 6: Final answer
    x = 2,741.73

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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.