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Finding the Fourth Proportional to 10,991.79, 16,481.07 and 7,486.11

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Solution

The fourth proportional to 10,991.79, 16,481.07 and 7,486.11 is: 11,224.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,991.79 : 16,481.07 = 7,486.11 : x
  2. Step 2: Convert to fraction form
    10,991.79/16,481.07 = 7,486.11/x
  3. Step 3: Cross multiply
    10,991.79x = 16,481.07 × 7,486.11
  4. Step 4: Simplify right side
    10,991.79x = 123,379,102.94
  5. Step 5: Solve for x
    x = 123,379,102.94/10,991.79
  6. Step 6: Final answer
    x = 11,224.66

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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.