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Finding the Fourth Proportional to 12,328, 17,012.70 and 6,739

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Solution

The fourth proportional to 12,328, 17,012.70 and 6,739 is: 9,299.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,328 : 17,012.70 = 6,739 : x
  2. Step 2: Convert to fraction form
    12,328/17,012.70 = 6,739/x
  3. Step 3: Cross multiply
    12,328x = 17,012.70 × 6,739
  4. Step 4: Simplify right side
    12,328x = 114,648,585.30
  5. Step 5: Solve for x
    x = 114,648,585.30/12,328
  6. Step 6: Final answer
    x = 9,299.85

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.