Home / 12,578.24-18,867.40-3,813.20

Finding the Fourth Proportional to 12,578.24, 18,867.40 and 3,813.20

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Solution

The fourth proportional to 12,578.24, 18,867.40 and 3,813.20 is: 5,719.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,578.24 : 18,867.40 = 3,813.20 : x
  2. Step 2: Convert to fraction form
    12,578.24/18,867.40 = 3,813.20/x
  3. Step 3: Cross multiply
    12,578.24x = 18,867.40 × 3,813.20
  4. Step 4: Simplify right side
    12,578.24x = 71,945,169.68
  5. Step 5: Solve for x
    x = 71,945,169.68/12,578.24
  6. Step 6: Final answer
    x = 5,719.81

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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.