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Finding the Fourth Proportional to 21,960.72, 32,928.12 and 8,110.80

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Solution

The fourth proportional to 21,960.72, 32,928.12 and 8,110.80 is: 12,161.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.72 : 32,928.12 = 8,110.80 : x
  2. Step 2: Convert to fraction form
    21,960.72/32,928.12 = 8,110.80/x
  3. Step 3: Cross multiply
    21,960.72x = 32,928.12 × 8,110.80
  4. Step 4: Simplify right side
    21,960.72x = 267,073,395.70
  5. Step 5: Solve for x
    x = 267,073,395.70/21,960.72
  6. Step 6: Final answer
    x = 12,161.41

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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.