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Finding the Fourth Proportional to 21,481.25, 32,220.59 and 12,771.59

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Solution

The fourth proportional to 21,481.25, 32,220.59 and 12,771.59 is: 19,156.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.25 : 32,220.59 = 12,771.59 : x
  2. Step 2: Convert to fraction form
    21,481.25/32,220.59 = 12,771.59/x
  3. Step 3: Cross multiply
    21,481.25x = 32,220.59 × 12,771.59
  4. Step 4: Simplify right side
    21,481.25x = 411,507,940.08
  5. Step 5: Solve for x
    x = 411,507,940.08/21,481.25
  6. Step 6: Final answer
    x = 19,156.61

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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.