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Finding the Fourth Proportional to 18,052.60, 27,078.90 and 12,147.70

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Solution

The fourth proportional to 18,052.60, 27,078.90 and 12,147.70 is: 18,221.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,052.60 : 27,078.90 = 12,147.70 : x
  2. Step 2: Convert to fraction form
    18,052.60/27,078.90 = 12,147.70/x
  3. Step 3: Cross multiply
    18,052.60x = 27,078.90 × 12,147.70
  4. Step 4: Simplify right side
    18,052.60x = 328,946,353.53
  5. Step 5: Solve for x
    x = 328,946,353.53/18,052.60
  6. Step 6: Final answer
    x = 18,221.55

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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.