Home / 12,685.11-17,512.49-7,650.61

Finding the Fourth Proportional to 12,685.11, 17,512.49 and 7,650.61

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Solution

The fourth proportional to 12,685.11, 17,512.49 and 7,650.61 is: 10,562.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,685.11 : 17,512.49 = 7,650.61 : x
  2. Step 2: Convert to fraction form
    12,685.11/17,512.49 = 7,650.61/x
  3. Step 3: Cross multiply
    12,685.11x = 17,512.49 × 7,650.61
  4. Step 4: Simplify right side
    12,685.11x = 133,981,231.12
  5. Step 5: Solve for x
    x = 133,981,231.12/12,685.11
  6. Step 6: Final answer
    x = 10,562.09

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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.