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Finding the Fourth Proportional to 18,726.27, 28,106.41 and 9,968.55

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Solution

The fourth proportional to 18,726.27, 28,106.41 and 9,968.55 is: 14,961.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,726.27 : 28,106.41 = 9,968.55 : x
  2. Step 2: Convert to fraction form
    18,726.27/28,106.41 = 9,968.55/x
  3. Step 3: Cross multiply
    18,726.27x = 28,106.41 × 9,968.55
  4. Step 4: Simplify right side
    18,726.27x = 280,180,153.41
  5. Step 5: Solve for x
    x = 280,180,153.41/18,726.27
  6. Step 6: Final answer
    x = 14,961.88

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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.