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Finding the Fourth Proportional to 18,658.92, 27,988.44 and 9,310.41

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Solution

The fourth proportional to 18,658.92, 27,988.44 and 9,310.41 is: 13,965.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,658.92 : 27,988.44 = 9,310.41 : x
  2. Step 2: Convert to fraction form
    18,658.92/27,988.44 = 9,310.41/x
  3. Step 3: Cross multiply
    18,658.92x = 27,988.44 × 9,310.41
  4. Step 4: Simplify right side
    18,658.92x = 260,583,816.75
  5. Step 5: Solve for x
    x = 260,583,816.75/18,658.92
  6. Step 6: Final answer
    x = 13,965.64

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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.