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Finding the Fourth Proportional to 18,438.70, 27,662.10 and 5,956.60

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Solution

The fourth proportional to 18,438.70, 27,662.10 and 5,956.60 is: 8,936.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,438.70 : 27,662.10 = 5,956.60 : x
  2. Step 2: Convert to fraction form
    18,438.70/27,662.10 = 5,956.60/x
  3. Step 3: Cross multiply
    18,438.70x = 27,662.10 × 5,956.60
  4. Step 4: Simplify right side
    18,438.70x = 164,772,064.86
  5. Step 5: Solve for x
    x = 164,772,064.86/18,438.70
  6. Step 6: Final answer
    x = 8,936.21

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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.