Home / 31,986.38-47,979.57-8,612.82

Finding the Fourth Proportional to 31,986.38, 47,979.57 and 8,612.82

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Solution

The fourth proportional to 31,986.38, 47,979.57 and 8,612.82 is: 12,919.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,986.38 : 47,979.57 = 8,612.82 : x
  2. Step 2: Convert to fraction form
    31,986.38/47,979.57 = 8,612.82/x
  3. Step 3: Cross multiply
    31,986.38x = 47,979.57 × 8,612.82
  4. Step 4: Simplify right side
    31,986.38x = 413,239,400.09
  5. Step 5: Solve for x
    x = 413,239,400.09/31,986.38
  6. Step 6: Final answer
    x = 12,919.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.