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Finding the Fourth Proportional to 8,416.55, 12,620.95 and 2,491.32

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Solution

The fourth proportional to 8,416.55, 12,620.95 and 2,491.32 is: 3,735.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,416.55 : 12,620.95 = 2,491.32 : x
  2. Step 2: Convert to fraction form
    8,416.55/12,620.95 = 2,491.32/x
  3. Step 3: Cross multiply
    8,416.55x = 12,620.95 × 2,491.32
  4. Step 4: Simplify right side
    8,416.55x = 31,442,795.26
  5. Step 5: Solve for x
    x = 31,442,795.26/8,416.55
  6. Step 6: Final answer
    x = 3,735.83

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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.