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Finding the Fourth Proportional to 18,115.40, 27,230.70 and 17,078.60

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Solution

The fourth proportional to 18,115.40, 27,230.70 and 17,078.60 is: 25,672.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,115.40 : 27,230.70 = 17,078.60 : x
  2. Step 2: Convert to fraction form
    18,115.40/27,230.70 = 17,078.60/x
  3. Step 3: Cross multiply
    18,115.40x = 27,230.70 × 17,078.60
  4. Step 4: Simplify right side
    18,115.40x = 465,062,233.02
  5. Step 5: Solve for x
    x = 465,062,233.02/18,115.40
  6. Step 6: Final answer
    x = 25,672.20

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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.