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Finding the Fourth Proportional to 7,990.74, 11,992.53 and 3,608.58

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Solution

The fourth proportional to 7,990.74, 11,992.53 and 3,608.58 is: 5,415.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.74 : 11,992.53 = 3,608.58 : x
  2. Step 2: Convert to fraction form
    7,990.74/11,992.53 = 3,608.58/x
  3. Step 3: Cross multiply
    7,990.74x = 11,992.53 × 3,608.58
  4. Step 4: Simplify right side
    7,990.74x = 43,276,003.91
  5. Step 5: Solve for x
    x = 43,276,003.91/7,990.74
  6. Step 6: Final answer
    x = 5,415.77

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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.