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Finding the Fourth Proportional to 12,239.91, 16,891.20 and 6,934.68

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Solution

The fourth proportional to 12,239.91, 16,891.20 and 6,934.68 is: 9,569.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,239.91 : 16,891.20 = 6,934.68 : x
  2. Step 2: Convert to fraction form
    12,239.91/16,891.20 = 6,934.68/x
  3. Step 3: Cross multiply
    12,239.91x = 16,891.20 × 6,934.68
  4. Step 4: Simplify right side
    12,239.91x = 117,135,066.82
  5. Step 5: Solve for x
    x = 117,135,066.82/12,239.91
  6. Step 6: Final answer
    x = 9,569.93

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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.