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Finding the Fourth Proportional to 11,105.60, 16,663.20 and 5,259.20

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Solution

The fourth proportional to 11,105.60, 16,663.20 and 5,259.20 is: 7,891.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,105.60 : 16,663.20 = 5,259.20 : x
  2. Step 2: Convert to fraction form
    11,105.60/16,663.20 = 5,259.20/x
  3. Step 3: Cross multiply
    11,105.60x = 16,663.20 × 5,259.20
  4. Step 4: Simplify right side
    11,105.60x = 87,635,101.44
  5. Step 5: Solve for x
    x = 87,635,101.44/11,105.60
  6. Step 6: Final answer
    x = 7,891.07

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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.