Home / 7,115.20-10,663.80-2,726.80

Finding the Fourth Proportional to 7,115.20, 10,663.80 and 2,726.80

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Solution

The fourth proportional to 7,115.20, 10,663.80 and 2,726.80 is: 4,086.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,115.20 : 10,663.80 = 2,726.80 : x
  2. Step 2: Convert to fraction form
    7,115.20/10,663.80 = 2,726.80/x
  3. Step 3: Cross multiply
    7,115.20x = 10,663.80 × 2,726.80
  4. Step 4: Simplify right side
    7,115.20x = 29,078,049.84
  5. Step 5: Solve for x
    x = 29,078,049.84/7,115.20
  6. Step 6: Final answer
    x = 4,086.75

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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.