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Finding the Fourth Proportional to 7,990.44, 11,987.10 and 3,609.96

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Solution

The fourth proportional to 7,990.44, 11,987.10 and 3,609.96 is: 5,415.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.44 : 11,987.10 = 3,609.96 : x
  2. Step 2: Convert to fraction form
    7,990.44/11,987.10 = 3,609.96/x
  3. Step 3: Cross multiply
    7,990.44x = 11,987.10 × 3,609.96
  4. Step 4: Simplify right side
    7,990.44x = 43,272,951.52
  5. Step 5: Solve for x
    x = 43,272,951.52/7,990.44
  6. Step 6: Final answer
    x = 5,415.59

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1.5x scale

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.