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Finding the Fourth Proportional to 12,367.91, 17,067.11 and 6,990.45

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Solution

The fourth proportional to 12,367.91, 17,067.11 and 6,990.45 is: 9,646.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,367.91 : 17,067.11 = 6,990.45 : x
  2. Step 2: Convert to fraction form
    12,367.91/17,067.11 = 6,990.45/x
  3. Step 3: Cross multiply
    12,367.91x = 17,067.11 × 6,990.45
  4. Step 4: Simplify right side
    12,367.91x = 119,306,744.15
  5. Step 5: Solve for x
    x = 119,306,744.15/12,367.91
  6. Step 6: Final answer
    x = 9,646.48

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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.