Home / 20,121.76-27,766.72-11,169.27

Finding the Fourth Proportional to 20,121.76, 27,766.72 and 11,169.27

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Solution

The fourth proportional to 20,121.76, 27,766.72 and 11,169.27 is: 15,412.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.76 : 27,766.72 = 11,169.27 : x
  2. Step 2: Convert to fraction form
    20,121.76/27,766.72 = 11,169.27/x
  3. Step 3: Cross multiply
    20,121.76x = 27,766.72 × 11,169.27
  4. Step 4: Simplify right side
    20,121.76x = 310,133,853.86
  5. Step 5: Solve for x
    x = 310,133,853.86/20,121.76
  6. Step 6: Final answer
    x = 15,412.86

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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.