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Finding the Fourth Proportional to 7,989.99, 11,991.41 and 3,607.83

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Solution

The fourth proportional to 7,989.99, 11,991.41 and 3,607.83 is: 5,414.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.99 : 11,991.41 = 3,607.83 : x
  2. Step 2: Convert to fraction form
    7,989.99/11,991.41 = 3,607.83/x
  3. Step 3: Cross multiply
    7,989.99x = 11,991.41 × 3,607.83
  4. Step 4: Simplify right side
    7,989.99x = 43,262,950.70
  5. Step 5: Solve for x
    x = 43,262,950.70/7,989.99
  6. Step 6: Final answer
    x = 5,414.64

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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.