Home / 12,747.57-19,120.13-3,387.81

Finding the Fourth Proportional to 12,747.57, 19,120.13 and 3,387.81

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Solution

The fourth proportional to 12,747.57, 19,120.13 and 3,387.81 is: 5,081.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,747.57 : 19,120.13 = 3,387.81 : x
  2. Step 2: Convert to fraction form
    12,747.57/19,120.13 = 3,387.81/x
  3. Step 3: Cross multiply
    12,747.57x = 19,120.13 × 3,387.81
  4. Step 4: Simplify right side
    12,747.57x = 64,775,367.62
  5. Step 5: Solve for x
    x = 64,775,367.62/12,747.57
  6. Step 6: Final answer
    x = 5,081.39

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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.