Home / 3,687.60-5,531.40-2,521.20

Finding the Fourth Proportional to 3,687.60, 5,531.40 and 2,521.20

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Solution

The fourth proportional to 3,687.60, 5,531.40 and 2,521.20 is: 3,781.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,687.60 : 5,531.40 = 2,521.20 : x
  2. Step 2: Convert to fraction form
    3,687.60/5,531.40 = 2,521.20/x
  3. Step 3: Cross multiply
    3,687.60x = 5,531.40 × 2,521.20
  4. Step 4: Simplify right side
    3,687.60x = 13,945,765.68
  5. Step 5: Solve for x
    x = 13,945,765.68/3,687.60
  6. Step 6: Final answer
    x = 3,781.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.