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Finding the Fourth Proportional to 17,321.60, 25,982.40 and 12,072.80

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Solution

The fourth proportional to 17,321.60, 25,982.40 and 12,072.80 is: 18,109.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,321.60 : 25,982.40 = 12,072.80 : x
  2. Step 2: Convert to fraction form
    17,321.60/25,982.40 = 12,072.80/x
  3. Step 3: Cross multiply
    17,321.60x = 25,982.40 × 12,072.80
  4. Step 4: Simplify right side
    17,321.60x = 313,680,318.72
  5. Step 5: Solve for x
    x = 313,680,318.72/17,321.60
  6. Step 6: Final answer
    x = 18,109.20

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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.