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Finding the Fourth Proportional to 8,979.60, 13,470.10 and 2,405.72

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Solution

The fourth proportional to 8,979.60, 13,470.10 and 2,405.72 is: 3,608.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,979.60 : 13,470.10 = 2,405.72 : x
  2. Step 2: Convert to fraction form
    8,979.60/13,470.10 = 2,405.72/x
  3. Step 3: Cross multiply
    8,979.60x = 13,470.10 × 2,405.72
  4. Step 4: Simplify right side
    8,979.60x = 32,405,288.97
  5. Step 5: Solve for x
    x = 32,405,288.97/8,979.60
  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.