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Finding the Fourth Proportional to 7,131, 10,696.78 and 2,200.68

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Solution

The fourth proportional to 7,131, 10,696.78 and 2,200.68 is: 3,301.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,131 : 10,696.78 = 2,200.68 : x
  2. Step 2: Convert to fraction form
    7,131/10,696.78 = 2,200.68/x
  3. Step 3: Cross multiply
    7,131x = 10,696.78 × 2,200.68
  4. Step 4: Simplify right side
    7,131x = 23,540,189.81
  5. Step 5: Solve for x
    x = 23,540,189.81/7,131
  6. Step 6: Final answer
    x = 3,301.11

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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.