Home / 3,643.75-5,028.38-1,987.75

Finding the Fourth Proportional to 3,643.75, 5,028.38 and 1,987.75

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Solution

The fourth proportional to 3,643.75, 5,028.38 and 1,987.75 is: 2,743.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,643.75 : 5,028.38 = 1,987.75 : x
  2. Step 2: Convert to fraction form
    3,643.75/5,028.38 = 1,987.75/x
  3. Step 3: Cross multiply
    3,643.75x = 5,028.38 × 1,987.75
  4. Step 4: Simplify right side
    3,643.75x = 9,995,162.35
  5. Step 5: Solve for x
    x = 9,995,162.35/3,643.75
  6. Step 6: Final answer
    x = 2,743.10

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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.