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Finding the Fourth Proportional to 8,486.49, 12,728.91 and 5,197.89

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Solution

The fourth proportional to 8,486.49, 12,728.91 and 5,197.89 is: 7,796.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.49 : 12,728.91 = 5,197.89 : x
  2. Step 2: Convert to fraction form
    8,486.49/12,728.91 = 5,197.89/x
  3. Step 3: Cross multiply
    8,486.49x = 12,728.91 × 5,197.89
  4. Step 4: Simplify right side
    8,486.49x = 66,163,474.00
  5. Step 5: Solve for x
    x = 66,163,474.00/8,486.49
  6. Step 6: Final answer
    x = 7,796.33

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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.