Home / 3,987.68-5,502.80-2,219.44

Finding the Fourth Proportional to 3,987.68, 5,502.80 and 2,219.44

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Solution

The fourth proportional to 3,987.68, 5,502.80 and 2,219.44 is: 3,062.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.68 : 5,502.80 = 2,219.44 : x
  2. Step 2: Convert to fraction form
    3,987.68/5,502.80 = 2,219.44/x
  3. Step 3: Cross multiply
    3,987.68x = 5,502.80 × 2,219.44
  4. Step 4: Simplify right side
    3,987.68x = 12,213,134.43
  5. Step 5: Solve for x
    x = 12,213,134.43/3,987.68
  6. Step 6: Final answer
    x = 3,062.72

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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.