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Finding the Fourth Proportional to 8,479.65, 12,723.99 and 6,385.26

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Solution

The fourth proportional to 8,479.65, 12,723.99 and 6,385.26 is: 9,581.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,479.65 : 12,723.99 = 6,385.26 : x
  2. Step 2: Convert to fraction form
    8,479.65/12,723.99 = 6,385.26/x
  3. Step 3: Cross multiply
    8,479.65x = 12,723.99 × 6,385.26
  4. Step 4: Simplify right side
    8,479.65x = 81,245,984.39
  5. Step 5: Solve for x
    x = 81,245,984.39/8,479.65
  6. Step 6: Final answer
    x = 9,581.29

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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.