Home / 3,987.30-5,974.30-2,815.37

Finding the Fourth Proportional to 3,987.30, 5,974.30 and 2,815.37

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Solution

The fourth proportional to 3,987.30, 5,974.30 and 2,815.37 is: 4,218.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.30 : 5,974.30 = 2,815.37 : x
  2. Step 2: Convert to fraction form
    3,987.30/5,974.30 = 2,815.37/x
  3. Step 3: Cross multiply
    3,987.30x = 5,974.30 × 2,815.37
  4. Step 4: Simplify right side
    3,987.30x = 16,819,864.99
  5. Step 5: Solve for x
    x = 16,819,864.99/3,987.30
  6. Step 6: Final answer
    x = 4,218.36

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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.