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Finding the Fourth Proportional to 8,958.72, 13,440.80 and 3,619.16

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Solution

The fourth proportional to 8,958.72, 13,440.80 and 3,619.16 is: 5,429.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,958.72 : 13,440.80 = 3,619.16 : x
  2. Step 2: Convert to fraction form
    8,958.72/13,440.80 = 3,619.16/x
  3. Step 3: Cross multiply
    8,958.72x = 13,440.80 × 3,619.16
  4. Step 4: Simplify right side
    8,958.72x = 48,644,405.73
  5. Step 5: Solve for x
    x = 48,644,405.73/8,958.72
  6. Step 6: Final answer
    x = 5,429.84

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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.