Home / 20,872.27-28,803.42-11,311.93

Finding the Fourth Proportional to 20,872.27, 28,803.42 and 11,311.93

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Solution

The fourth proportional to 20,872.27, 28,803.42 and 11,311.93 is: 15,610.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,872.27 : 28,803.42 = 11,311.93 : x
  2. Step 2: Convert to fraction form
    20,872.27/28,803.42 = 11,311.93/x
  3. Step 3: Cross multiply
    20,872.27x = 28,803.42 × 11,311.93
  4. Step 4: Simplify right side
    20,872.27x = 325,822,270.80
  5. Step 5: Solve for x
    x = 325,822,270.80/20,872.27
  6. Step 6: Final answer
    x = 15,610.29

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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.