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Finding the Fourth Proportional to 8,674.25, 12,990.39 and 4,965.23

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Solution

The fourth proportional to 8,674.25, 12,990.39 and 4,965.23 is: 7,435.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,674.25 : 12,990.39 = 4,965.23 : x
  2. Step 2: Convert to fraction form
    8,674.25/12,990.39 = 4,965.23/x
  3. Step 3: Cross multiply
    8,674.25x = 12,990.39 × 4,965.23
  4. Step 4: Simplify right side
    8,674.25x = 64,500,209.19
  5. Step 5: Solve for x
    x = 64,500,209.19/8,674.25
  6. Step 6: Final answer
    x = 7,435.83

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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.