Home / 21,936.72-32,906.88-8,781.92

Finding the Fourth Proportional to 21,936.72, 32,906.88 and 8,781.92

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Solution

The fourth proportional to 21,936.72, 32,906.88 and 8,781.92 is: 13,173.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.72 : 32,906.88 = 8,781.92 : x
  2. Step 2: Convert to fraction form
    21,936.72/32,906.88 = 8,781.92/x
  3. Step 3: Cross multiply
    21,936.72x = 32,906.88 × 8,781.92
  4. Step 4: Simplify right side
    21,936.72x = 288,985,587.61
  5. Step 5: Solve for x
    x = 288,985,587.61/21,936.72
  6. Step 6: Final answer
    x = 13,173.60

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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.