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Finding the Fourth Proportional to 18,461.62, 27,650.73 and 12,939.55

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Solution

The fourth proportional to 18,461.62, 27,650.73 and 12,939.55 is: 19,380.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,461.62 : 27,650.73 = 12,939.55 : x
  2. Step 2: Convert to fraction form
    18,461.62/27,650.73 = 12,939.55/x
  3. Step 3: Cross multiply
    18,461.62x = 27,650.73 × 12,939.55
  4. Step 4: Simplify right side
    18,461.62x = 357,787,982.77
  5. Step 5: Solve for x
    x = 357,787,982.77/18,461.62
  6. Step 6: Final answer
    x = 19,380.10

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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.