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Finding the Fourth Proportional to 18,410.80, 27,616.20 and 12,881.20

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Solution

The fourth proportional to 18,410.80, 27,616.20 and 12,881.20 is: 19,321.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,410.80 : 27,616.20 = 12,881.20 : x
  2. Step 2: Convert to fraction form
    18,410.80/27,616.20 = 12,881.20/x
  3. Step 3: Cross multiply
    18,410.80x = 27,616.20 × 12,881.20
  4. Step 4: Simplify right side
    18,410.80x = 355,729,795.44
  5. Step 5: Solve for x
    x = 355,729,795.44/18,410.80
  6. Step 6: Final answer
    x = 19,321.80

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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.