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Finding the Fourth Proportional to 28,662.96, 42,999.50 and 8,936.61

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Solution

The fourth proportional to 28,662.96, 42,999.50 and 8,936.61 is: 13,406.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,662.96 : 42,999.50 = 8,936.61 : x
  2. Step 2: Convert to fraction form
    28,662.96/42,999.50 = 8,936.61/x
  3. Step 3: Cross multiply
    28,662.96x = 42,999.50 × 8,936.61
  4. Step 4: Simplify right side
    28,662.96x = 384,269,717.01
  5. Step 5: Solve for x
    x = 384,269,717.01/28,662.96
  6. Step 6: Final answer
    x = 13,406.49

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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.