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Finding the Fourth Proportional to 8,720.91, 12,034.62 and 4,943.97

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Solution

The fourth proportional to 8,720.91, 12,034.62 and 4,943.97 is: 6,822.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,720.91 : 12,034.62 = 4,943.97 : x
  2. Step 2: Convert to fraction form
    8,720.91/12,034.62 = 4,943.97/x
  3. Step 3: Cross multiply
    8,720.91x = 12,034.62 × 4,943.97
  4. Step 4: Simplify right side
    8,720.91x = 59,498,800.24
  5. Step 5: Solve for x
    x = 59,498,800.24/8,720.91
  6. Step 6: Final answer
    x = 6,822.54

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.