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Finding the Fourth Proportional to 12,179.21, 16,807.78 and 6,874.21

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Solution

The fourth proportional to 12,179.21, 16,807.78 and 6,874.21 is: 9,486.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,179.21 : 16,807.78 = 6,874.21 : x
  2. Step 2: Convert to fraction form
    12,179.21/16,807.78 = 6,874.21/x
  3. Step 3: Cross multiply
    12,179.21x = 16,807.78 × 6,874.21
  4. Step 4: Simplify right side
    12,179.21x = 115,540,209.35
  5. Step 5: Solve for x
    x = 115,540,209.35/12,179.21
  6. Step 6: Final answer
    x = 9,486.68

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1.5x scale

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.