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Finding the Fourth Proportional to 11,999.43, 16,563.44 and 7,911.56

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Solution

The fourth proportional to 11,999.43, 16,563.44 and 7,911.56 is: 10,920.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,999.43 : 16,563.44 = 7,911.56 : x
  2. Step 2: Convert to fraction form
    11,999.43/16,563.44 = 7,911.56/x
  3. Step 3: Cross multiply
    11,999.43x = 16,563.44 × 7,911.56
  4. Step 4: Simplify right side
    11,999.43x = 131,042,526.99
  5. Step 5: Solve for x
    x = 131,042,526.99/11,999.43
  6. Step 6: Final answer
    x = 10,920.73

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Double scale
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Similar ratio
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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.