Home / 7,678.20-11,517.34-2,131.98

Finding the Fourth Proportional to 7,678.20, 11,517.34 and 2,131.98

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Solution

The fourth proportional to 7,678.20, 11,517.34 and 2,131.98 is: 3,197.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,678.20 : 11,517.34 = 2,131.98 : x
  2. Step 2: Convert to fraction form
    7,678.20/11,517.34 = 2,131.98/x
  3. Step 3: Cross multiply
    7,678.20x = 11,517.34 × 2,131.98
  4. Step 4: Simplify right side
    7,678.20x = 24,554,738.53
  5. Step 5: Solve for x
    x = 24,554,738.53/7,678.20
  6. Step 6: Final answer
    x = 3,197.98

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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.