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Finding the Fourth Proportional to 7,990.99, 11,992.91 and 3,608.83

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Solution

The fourth proportional to 7,990.99, 11,992.91 and 3,608.83 is: 5,416.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.99 : 11,992.91 = 3,608.83 : x
  2. Step 2: Convert to fraction form
    7,990.99/11,992.91 = 3,608.83/x
  3. Step 3: Cross multiply
    7,990.99x = 11,992.91 × 3,608.83
  4. Step 4: Simplify right side
    7,990.99x = 43,280,373.40
  5. Step 5: Solve for x
    x = 43,280,373.40/7,990.99
  6. Step 6: Final answer
    x = 5,416.15

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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.