Home / 18,519.80-27,747.36-15,419.75

Finding the Fourth Proportional to 18,519.80, 27,747.36 and 15,419.75

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Solution

The fourth proportional to 18,519.80, 27,747.36 and 15,419.75 is: 23,102.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,519.80 : 27,747.36 = 15,419.75 : x
  2. Step 2: Convert to fraction form
    18,519.80/27,747.36 = 15,419.75/x
  3. Step 3: Cross multiply
    18,519.80x = 27,747.36 × 15,419.75
  4. Step 4: Simplify right side
    18,519.80x = 427,857,215.62
  5. Step 5: Solve for x
    x = 427,857,215.62/18,519.80
  6. Step 6: Final answer
    x = 23,102.70

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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.