Home / 12,386.97-18,578.43-3,619.85

Finding the Fourth Proportional to 12,386.97, 18,578.43 and 3,619.85

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Solution

The fourth proportional to 12,386.97, 18,578.43 and 3,619.85 is: 5,429.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,386.97 : 18,578.43 = 3,619.85 : x
  2. Step 2: Convert to fraction form
    12,386.97/18,578.43 = 3,619.85/x
  3. Step 3: Cross multiply
    12,386.97x = 18,578.43 × 3,619.85
  4. Step 4: Simplify right side
    12,386.97x = 67,251,036.94
  5. Step 5: Solve for x
    x = 67,251,036.94/12,386.97
  6. Step 6: Final answer
    x = 5,429.18

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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.