Home / 13,786.88-20,680.38-3,398.63

Finding the Fourth Proportional to 13,786.88, 20,680.38 and 3,398.63

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Solution

The fourth proportional to 13,786.88, 20,680.38 and 3,398.63 is: 5,097.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,786.88 : 20,680.38 = 3,398.63 : x
  2. Step 2: Convert to fraction form
    13,786.88/20,680.38 = 3,398.63/x
  3. Step 3: Cross multiply
    13,786.88x = 20,680.38 × 3,398.63
  4. Step 4: Simplify right side
    13,786.88x = 70,284,856.48
  5. Step 5: Solve for x
    x = 70,284,856.48/13,786.88
  6. Step 6: Final answer
    x = 5,097.95

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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.