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Finding the Fourth Proportional to 11,991.69, 16,550.16 and 6,889.20

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Solution

The fourth proportional to 11,991.69, 16,550.16 and 6,889.20 is: 9,508.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,991.69 : 16,550.16 = 6,889.20 : x
  2. Step 2: Convert to fraction form
    11,991.69/16,550.16 = 6,889.20/x
  3. Step 3: Cross multiply
    11,991.69x = 16,550.16 × 6,889.20
  4. Step 4: Simplify right side
    11,991.69x = 114,017,362.27
  5. Step 5: Solve for x
    x = 114,017,362.27/11,991.69
  6. Step 6: Final answer
    x = 9,508.03

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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.