Home / 12,738.69-19,109.66-3,972.87

Finding the Fourth Proportional to 12,738.69, 19,109.66 and 3,972.87

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Solution

The fourth proportional to 12,738.69, 19,109.66 and 3,972.87 is: 5,959.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,738.69 : 19,109.66 = 3,972.87 : x
  2. Step 2: Convert to fraction form
    12,738.69/19,109.66 = 3,972.87/x
  3. Step 3: Cross multiply
    12,738.69x = 19,109.66 × 3,972.87
  4. Step 4: Simplify right side
    12,738.69x = 75,920,175.06
  5. Step 5: Solve for x
    x = 75,920,175.06/12,738.69
  6. Step 6: Final answer
    x = 5,959.81

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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.