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Finding the Fourth Proportional to 12,310.98, 16,989.12 and 6,721.98

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Solution

The fourth proportional to 12,310.98, 16,989.12 and 6,721.98 is: 9,276.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,310.98 : 16,989.12 = 6,721.98 : x
  2. Step 2: Convert to fraction form
    12,310.98/16,989.12 = 6,721.98/x
  3. Step 3: Cross multiply
    12,310.98x = 16,989.12 × 6,721.98
  4. Step 4: Simplify right side
    12,310.98x = 114,200,524.86
  5. Step 5: Solve for x
    x = 114,200,524.86/12,310.98
  6. Step 6: Final answer
    x = 9,276.31

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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.