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Finding the Fourth Proportional to 8,173.99, 12,262.80 and 2,979.86

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Solution

The fourth proportional to 8,173.99, 12,262.80 and 2,979.86 is: 4,470.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,173.99 : 12,262.80 = 2,979.86 : x
  2. Step 2: Convert to fraction form
    8,173.99/12,262.80 = 2,979.86/x
  3. Step 3: Cross multiply
    8,173.99x = 12,262.80 × 2,979.86
  4. Step 4: Simplify right side
    8,173.99x = 36,541,427.21
  5. Step 5: Solve for x
    x = 36,541,427.21/8,173.99
  6. Step 6: Final answer
    x = 4,470.45

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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.