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Finding the Fourth Proportional to 8,391.79, 12,589.44 and 2,849.05

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Solution

The fourth proportional to 8,391.79, 12,589.44 and 2,849.05 is: 4,274.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,391.79 : 12,589.44 = 2,849.05 : x
  2. Step 2: Convert to fraction form
    8,391.79/12,589.44 = 2,849.05/x
  3. Step 3: Cross multiply
    8,391.79x = 12,589.44 × 2,849.05
  4. Step 4: Simplify right side
    8,391.79x = 35,867,944.03
  5. Step 5: Solve for x
    x = 35,867,944.03/8,391.79
  6. Step 6: Final answer
    x = 4,274.17

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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.