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Finding the Fourth Proportional to 8,469.99, 12,709.83 and 6,615.90

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Solution

The fourth proportional to 8,469.99, 12,709.83 and 6,615.90 is: 9,927.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,469.99 : 12,709.83 = 6,615.90 : x
  2. Step 2: Convert to fraction form
    8,469.99/12,709.83 = 6,615.90/x
  3. Step 3: Cross multiply
    8,469.99x = 12,709.83 × 6,615.90
  4. Step 4: Simplify right side
    8,469.99x = 84,086,964.30
  5. Step 5: Solve for x
    x = 84,086,964.30/8,469.99
  6. Step 6: Final answer
    x = 9,927.63

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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.