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Finding the Fourth Proportional to 8,556.71, 11,722.49 and 8,236.90

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Solution

The fourth proportional to 8,556.71, 11,722.49 and 8,236.90 is: 11,284.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,556.71 : 11,722.49 = 8,236.90 : x
  2. Step 2: Convert to fraction form
    8,556.71/11,722.49 = 8,236.90/x
  3. Step 3: Cross multiply
    8,556.71x = 11,722.49 × 8,236.90
  4. Step 4: Simplify right side
    8,556.71x = 96,556,977.88
  5. Step 5: Solve for x
    x = 96,556,977.88/8,556.71
  6. Step 6: Final answer
    x = 11,284.36

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.