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Finding the Fourth Proportional to 7,812.77, 11,720.63 and 2,882.79

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Solution

The fourth proportional to 7,812.77, 11,720.63 and 2,882.79 is: 4,324.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,812.77 : 11,720.63 = 2,882.79 : x
  2. Step 2: Convert to fraction form
    7,812.77/11,720.63 = 2,882.79/x
  3. Step 3: Cross multiply
    7,812.77x = 11,720.63 × 2,882.79
  4. Step 4: Simplify right side
    7,812.77x = 33,788,122.16
  5. Step 5: Solve for x
    x = 33,788,122.16/7,812.77
  6. Step 6: Final answer
    x = 4,324.73

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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.