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Finding the Fourth Proportional to 7,989.06, 11,978.58 and 2,440.56

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Solution

The fourth proportional to 7,989.06, 11,978.58 and 2,440.56 is: 3,659.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.06 : 11,978.58 = 2,440.56 : x
  2. Step 2: Convert to fraction form
    7,989.06/11,978.58 = 2,440.56/x
  3. Step 3: Cross multiply
    7,989.06x = 11,978.58 × 2,440.56
  4. Step 4: Simplify right side
    7,989.06x = 29,234,443.20
  5. Step 5: Solve for x
    x = 29,234,443.20/7,989.06
  6. Step 6: Final answer
    x = 3,659.31

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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.