Home / 3,987.48-5,494.32-2,728.74

Finding the Fourth Proportional to 3,987.48, 5,494.32 and 2,728.74

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Solution

The fourth proportional to 3,987.48, 5,494.32 and 2,728.74 is: 3,759.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.48 : 5,494.32 = 2,728.74 : x
  2. Step 2: Convert to fraction form
    3,987.48/5,494.32 = 2,728.74/x
  3. Step 3: Cross multiply
    3,987.48x = 5,494.32 × 2,728.74
  4. Step 4: Simplify right side
    3,987.48x = 14,992,570.76
  5. Step 5: Solve for x
    x = 14,992,570.76/3,987.48
  6. Step 6: Final answer
    x = 3,759.91

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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.