Home / 7,978.20-11,964.54-3,822.90

Finding the Fourth Proportional to 7,978.20, 11,964.54 and 3,822.90

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Solution

The fourth proportional to 7,978.20, 11,964.54 and 3,822.90 is: 5,733.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,978.20 : 11,964.54 = 3,822.90 : x
  2. Step 2: Convert to fraction form
    7,978.20/11,964.54 = 3,822.90/x
  3. Step 3: Cross multiply
    7,978.20x = 11,964.54 × 3,822.90
  4. Step 4: Simplify right side
    7,978.20x = 45,739,239.97
  5. Step 5: Solve for x
    x = 45,739,239.97/7,978.20
  6. Step 6: Final answer
    x = 5,733.03

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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.