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Finding the Fourth Proportional to 8,979.59, 13,470.11 and 2,405.72

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Solution

The fourth proportional to 8,979.59, 13,470.11 and 2,405.72 is: 3,608.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.59 : 13,470.11 = 2,405.72 : x
  2. Step 2: Convert to fraction form
    8,979.59/13,470.11 = 2,405.72/x
  3. Step 3: Cross multiply
    8,979.59x = 13,470.11 × 2,405.72
  4. Step 4: Simplify right side
    8,979.59x = 32,405,313.03
  5. Step 5: Solve for x
    x = 32,405,313.03/8,979.59
  6. Step 6: Final answer
    x = 3,608.77

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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.