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Finding the Fourth Proportional to 18,687.11, 25,793.22 and 12,634.58

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Solution

The fourth proportional to 18,687.11, 25,793.22 and 12,634.58 is: 17,439.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,687.11 : 25,793.22 = 12,634.58 : x
  2. Step 2: Convert to fraction form
    18,687.11/25,793.22 = 12,634.58/x
  3. Step 3: Cross multiply
    18,687.11x = 25,793.22 × 12,634.58
  4. Step 4: Simplify right side
    18,687.11x = 325,886,542.34
  5. Step 5: Solve for x
    x = 325,886,542.34/18,687.11
  6. Step 6: Final answer
    x = 17,439.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.