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Finding the Fourth Proportional to 20,636.84, 30,936.24 and 7,486.04

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Solution

The fourth proportional to 20,636.84, 30,936.24 and 7,486.04 is: 11,222.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,636.84 : 30,936.24 = 7,486.04 : x
  2. Step 2: Convert to fraction form
    20,636.84/30,936.24 = 7,486.04/x
  3. Step 3: Cross multiply
    20,636.84x = 30,936.24 × 7,486.04
  4. Step 4: Simplify right side
    20,636.84x = 231,589,930.09
  5. Step 5: Solve for x
    x = 231,589,930.09/20,636.84
  6. Step 6: Final answer
    x = 11,222.16

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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.