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Finding the Fourth Proportional to 21,668.87, 32,489.72 and 8,505.96

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Solution

The fourth proportional to 21,668.87, 32,489.72 and 8,505.96 is: 12,753.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,668.87 : 32,489.72 = 8,505.96 : x
  2. Step 2: Convert to fraction form
    21,668.87/32,489.72 = 8,505.96/x
  3. Step 3: Cross multiply
    21,668.87x = 32,489.72 × 8,505.96
  4. Step 4: Simplify right side
    21,668.87x = 276,356,216.20
  5. Step 5: Solve for x
    x = 276,356,216.20/21,668.87
  6. Step 6: Final answer
    x = 12,753.61

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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.