Home / 21,481.75-32,221.34-12,772.09

Finding the Fourth Proportional to 21,481.75, 32,221.34 and 12,772.09

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Solution

The fourth proportional to 21,481.75, 32,221.34 and 12,772.09 is: 19,157.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,481.75 : 32,221.34 = 12,772.09 : x
  2. Step 2: Convert to fraction form
    21,481.75/32,221.34 = 12,772.09/x
  3. Step 3: Cross multiply
    21,481.75x = 32,221.34 × 12,772.09
  4. Step 4: Simplify right side
    21,481.75x = 411,533,629.43
  5. Step 5: Solve for x
    x = 411,533,629.43/21,481.75
  6. Step 6: Final answer
    x = 19,157.36

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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.