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Finding the Fourth Proportional to 12,167.90, 16,791.72 and 6,578.90

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Solution

The fourth proportional to 12,167.90, 16,791.72 and 6,578.90 is: 9,078.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,167.90 : 16,791.72 = 6,578.90 : x
  2. Step 2: Convert to fraction form
    12,167.90/16,791.72 = 6,578.90/x
  3. Step 3: Cross multiply
    12,167.90x = 16,791.72 × 6,578.90
  4. Step 4: Simplify right side
    12,167.90x = 110,470,929.85
  5. Step 5: Solve for x
    x = 110,470,929.85/12,167.90
  6. Step 6: Final answer
    x = 9,078.89

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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.