Home / 20,817.25-28,727.22-11,385.61

Finding the Fourth Proportional to 20,817.25, 28,727.22 and 11,385.61

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Solution

The fourth proportional to 20,817.25, 28,727.22 and 11,385.61 is: 15,711.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,817.25 : 28,727.22 = 11,385.61 : x
  2. Step 2: Convert to fraction form
    20,817.25/28,727.22 = 11,385.61/x
  3. Step 3: Cross multiply
    20,817.25x = 28,727.22 × 11,385.61
  4. Step 4: Simplify right side
    20,817.25x = 327,076,923.30
  5. Step 5: Solve for x
    x = 327,076,923.30/20,817.25
  6. Step 6: Final answer
    x = 15,711.82

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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.