Home / 3,987.77-5,504.35-2,728.34

Finding the Fourth Proportional to 3,987.77, 5,504.35 and 2,728.34

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Solution

The fourth proportional to 3,987.77, 5,504.35 and 2,728.34 is: 3,765.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.77 : 5,504.35 = 2,728.34 : x
  2. Step 2: Convert to fraction form
    3,987.77/5,504.35 = 2,728.34/x
  3. Step 3: Cross multiply
    3,987.77x = 5,504.35 × 2,728.34
  4. Step 4: Simplify right side
    3,987.77x = 15,017,745.22
  5. Step 5: Solve for x
    x = 15,017,745.22/3,987.77
  6. Step 6: Final answer
    x = 3,765.96

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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.