Home / 20,286.18-27,986.28-12,727.38

Finding the Fourth Proportional to 20,286.18, 27,986.28 and 12,727.38

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Solution

The fourth proportional to 20,286.18, 27,986.28 and 12,727.38 is: 17,558.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,286.18 : 27,986.28 = 12,727.38 : x
  2. Step 2: Convert to fraction form
    20,286.18/27,986.28 = 12,727.38/x
  3. Step 3: Cross multiply
    20,286.18x = 27,986.28 × 12,727.38
  4. Step 4: Simplify right side
    20,286.18x = 356,192,020.35
  5. Step 5: Solve for x
    x = 356,192,020.35/20,286.18
  6. Step 6: Final answer
    x = 17,558.36

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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.