Home / 7,991.80-11,989.62-3,061.36

Finding the Fourth Proportional to 7,991.80, 11,989.62 and 3,061.36

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Solution

The fourth proportional to 7,991.80, 11,989.62 and 3,061.36 is: 4,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,991.80 : 11,989.62 = 3,061.36 : x
  2. Step 2: Convert to fraction form
    7,991.80/11,989.62 = 3,061.36/x
  3. Step 3: Cross multiply
    7,991.80x = 11,989.62 × 3,061.36
  4. Step 4: Simplify right side
    7,991.80x = 36,704,543.08
  5. Step 5: Solve for x
    x = 36,704,543.08/7,991.80
  6. Step 6: Final answer
    x = 4,592.78

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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.