Home / 20,217.91-27,900.78-11,721.70

Finding the Fourth Proportional to 20,217.91, 27,900.78 and 11,721.70

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Solution

The fourth proportional to 20,217.91, 27,900.78 and 11,721.70 is: 16,175.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,217.91 : 27,900.78 = 11,721.70 : x
  2. Step 2: Convert to fraction form
    20,217.91/27,900.78 = 11,721.70/x
  3. Step 3: Cross multiply
    20,217.91x = 27,900.78 × 11,721.70
  4. Step 4: Simplify right side
    20,217.91x = 327,044,572.93
  5. Step 5: Solve for x
    x = 327,044,572.93/20,217.91
  6. Step 6: Final answer
    x = 16,175.98

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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.