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Finding the Fourth Proportional to 18,616.60, 27,957.30 and 13,108.60

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Solution

The fourth proportional to 18,616.60, 27,957.30 and 13,108.60 is: 19,685.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,616.60 : 27,957.30 = 13,108.60 : x
  2. Step 2: Convert to fraction form
    18,616.60/27,957.30 = 13,108.60/x
  3. Step 3: Cross multiply
    18,616.60x = 27,957.30 × 13,108.60
  4. Step 4: Simplify right side
    18,616.60x = 366,481,062.78
  5. Step 5: Solve for x
    x = 366,481,062.78/18,616.60
  6. Step 6: Final answer
    x = 19,685.71

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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.