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Finding the Fourth Proportional to 8,991.42, 12,399.82 and 6,162.90

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Solution

The fourth proportional to 8,991.42, 12,399.82 and 6,162.90 is: 8,499.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,991.42 : 12,399.82 = 6,162.90 : x
  2. Step 2: Convert to fraction form
    8,991.42/12,399.82 = 6,162.90/x
  3. Step 3: Cross multiply
    8,991.42x = 12,399.82 × 6,162.90
  4. Step 4: Simplify right side
    8,991.42x = 76,418,850.68
  5. Step 5: Solve for x
    x = 76,418,850.68/8,991.42
  6. Step 6: Final answer
    x = 8,499.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.