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Finding the Fourth Proportional to 21,505.51, 32,265.78 and 8,367.09

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Solution

The fourth proportional to 21,505.51, 32,265.78 and 8,367.09 is: 12,553.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,505.51 : 32,265.78 = 8,367.09 : x
  2. Step 2: Convert to fraction form
    21,505.51/32,265.78 = 8,367.09/x
  3. Step 3: Cross multiply
    21,505.51x = 32,265.78 × 8,367.09
  4. Step 4: Simplify right side
    21,505.51x = 269,970,685.18
  5. Step 5: Solve for x
    x = 269,970,685.18/21,505.51
  6. Step 6: Final answer
    x = 12,553.56

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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.