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Finding the Fourth Proportional to 7,990.22, 11,980.86 and 5,494.34

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Solution

The fourth proportional to 7,990.22, 11,980.86 and 5,494.34 is: 8,238.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.22 : 11,980.86 = 5,494.34 : x
  2. Step 2: Convert to fraction form
    7,990.22/11,980.86 = 5,494.34/x
  3. Step 3: Cross multiply
    7,990.22x = 11,980.86 × 5,494.34
  4. Step 4: Simplify right side
    7,990.22x = 65,826,918.33
  5. Step 5: Solve for x
    x = 65,826,918.33/7,990.22
  6. Step 6: Final answer
    x = 8,238.44

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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.