Home / 18,517.80-27,778.50-5,369.88

Finding the Fourth Proportional to 18,517.80, 27,778.50 and 5,369.88

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Solution

The fourth proportional to 18,517.80, 27,778.50 and 5,369.88 is: 8,055.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,517.80 : 27,778.50 = 5,369.88 : x
  2. Step 2: Convert to fraction form
    18,517.80/27,778.50 = 5,369.88/x
  3. Step 3: Cross multiply
    18,517.80x = 27,778.50 × 5,369.88
  4. Step 4: Simplify right side
    18,517.80x = 149,167,211.58
  5. Step 5: Solve for x
    x = 149,167,211.58/18,517.80
  6. Step 6: Final answer
    x = 8,055.34

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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.