Home / 12,786.66-19,179.86-3,426.39

Finding the Fourth Proportional to 12,786.66, 19,179.86 and 3,426.39

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Solution

The fourth proportional to 12,786.66, 19,179.86 and 3,426.39 is: 5,139.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,786.66 : 19,179.86 = 3,426.39 : x
  2. Step 2: Convert to fraction form
    12,786.66/19,179.86 = 3,426.39/x
  3. Step 3: Cross multiply
    12,786.66x = 19,179.86 × 3,426.39
  4. Step 4: Simplify right side
    12,786.66x = 65,717,663.37
  5. Step 5: Solve for x
    x = 65,717,663.37/12,786.66
  6. Step 6: Final answer
    x = 5,139.55

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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.