Home / 18,979.88-28,487.09-10,102.68

Finding the Fourth Proportional to 18,979.88, 28,487.09 and 10,102.68

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Solution

The fourth proportional to 18,979.88, 28,487.09 and 10,102.68 is: 15,163.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,979.88 : 28,487.09 = 10,102.68 : x
  2. Step 2: Convert to fraction form
    18,979.88/28,487.09 = 10,102.68/x
  3. Step 3: Cross multiply
    18,979.88x = 28,487.09 × 10,102.68
  4. Step 4: Simplify right side
    18,979.88x = 287,795,811.97
  5. Step 5: Solve for x
    x = 287,795,811.97/18,979.88
  6. Step 6: Final answer
    x = 15,163.21

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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.