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Finding the Fourth Proportional to 11,161.60, 16,713.60 and 8,857.60

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Solution

The fourth proportional to 11,161.60, 16,713.60 and 8,857.60 is: 13,263.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,161.60 : 16,713.60 = 8,857.60 : x
  2. Step 2: Convert to fraction form
    11,161.60/16,713.60 = 8,857.60/x
  3. Step 3: Cross multiply
    11,161.60x = 16,713.60 × 8,857.60
  4. Step 4: Simplify right side
    11,161.60x = 148,042,383.36
  5. Step 5: Solve for x
    x = 148,042,383.36/11,161.60
  6. Step 6: Final answer
    x = 13,263.54

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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.