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Finding the Fourth Proportional to 18,845.72, 28,269.17 and 9,480.62

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Solution

The fourth proportional to 18,845.72, 28,269.17 and 9,480.62 is: 14,221.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,845.72 : 28,269.17 = 9,480.62 : x
  2. Step 2: Convert to fraction form
    18,845.72/28,269.17 = 9,480.62/x
  3. Step 3: Cross multiply
    18,845.72x = 28,269.17 × 9,480.62
  4. Step 4: Simplify right side
    18,845.72x = 268,009,069.74
  5. Step 5: Solve for x
    x = 268,009,069.74/18,845.72
  6. Step 6: Final answer
    x = 14,221.22

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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.