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Finding the Fourth Proportional to 27,815.70, 41,727.60 and 9,091.20

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Solution

The fourth proportional to 27,815.70, 41,727.60 and 9,091.20 is: 13,638.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,815.70 : 41,727.60 = 9,091.20 : x
  2. Step 2: Convert to fraction form
    27,815.70/41,727.60 = 9,091.20/x
  3. Step 3: Cross multiply
    27,815.70x = 41,727.60 × 9,091.20
  4. Step 4: Simplify right side
    27,815.70x = 379,353,957.12
  5. Step 5: Solve for x
    x = 379,353,957.12/27,815.70
  6. Step 6: Final answer
    x = 13,638.12

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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.