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Finding the Fourth Proportional to 18,654.20, 25,737.90 and 11,099.96

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Solution

The fourth proportional to 18,654.20, 25,737.90 and 11,099.96 is: 15,315.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,654.20 : 25,737.90 = 11,099.96 : x
  2. Step 2: Convert to fraction form
    18,654.20/25,737.90 = 11,099.96/x
  3. Step 3: Cross multiply
    18,654.20x = 25,737.90 × 11,099.96
  4. Step 4: Simplify right side
    18,654.20x = 285,689,660.48
  5. Step 5: Solve for x
    x = 285,689,660.48/18,654.20
  6. Step 6: Final answer
    x = 15,315.03

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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.