Home / 20,115.80-27,747.19-12,954.99

Finding the Fourth Proportional to 20,115.80, 27,747.19 and 12,954.99

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Solution

The fourth proportional to 20,115.80, 27,747.19 and 12,954.99 is: 17,869.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.80 : 27,747.19 = 12,954.99 : x
  2. Step 2: Convert to fraction form
    20,115.80/27,747.19 = 12,954.99/x
  3. Step 3: Cross multiply
    20,115.80x = 27,747.19 × 12,954.99
  4. Step 4: Simplify right side
    20,115.80x = 359,464,568.98
  5. Step 5: Solve for x
    x = 359,464,568.98/20,115.80
  6. Step 6: Final answer
    x = 17,869.76

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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.