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Finding the Fourth Proportional to 11,279.25, 16,918.80 and 8,816.14

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Solution

The fourth proportional to 11,279.25, 16,918.80 and 8,816.14 is: 13,224.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,279.25 : 16,918.80 = 8,816.14 : x
  2. Step 2: Convert to fraction form
    11,279.25/16,918.80 = 8,816.14/x
  3. Step 3: Cross multiply
    11,279.25x = 16,918.80 × 8,816.14
  4. Step 4: Simplify right side
    11,279.25x = 149,158,487.39
  5. Step 5: Solve for x
    x = 149,158,487.39/11,279.25
  6. Step 6: Final answer
    x = 13,224.15

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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.