Home / 20,809.72-28,719.92-11,736.80

Finding the Fourth Proportional to 20,809.72, 28,719.92 and 11,736.80

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Solution

The fourth proportional to 20,809.72, 28,719.92 and 11,736.80 is: 16,198.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,809.72 : 28,719.92 = 11,736.80 : x
  2. Step 2: Convert to fraction form
    20,809.72/28,719.92 = 11,736.80/x
  3. Step 3: Cross multiply
    20,809.72x = 28,719.92 × 11,736.80
  4. Step 4: Simplify right side
    20,809.72x = 337,079,957.06
  5. Step 5: Solve for x
    x = 337,079,957.06/20,809.72
  6. Step 6: Final answer
    x = 16,198.20

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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.