Home / 20,939.37-28,895.97-11,507.73

Finding the Fourth Proportional to 20,939.37, 28,895.97 and 11,507.73

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Solution

The fourth proportional to 20,939.37, 28,895.97 and 11,507.73 is: 15,880.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,939.37 : 28,895.97 = 11,507.73 : x
  2. Step 2: Convert to fraction form
    20,939.37/28,895.97 = 11,507.73/x
  3. Step 3: Cross multiply
    20,939.37x = 28,895.97 × 11,507.73
  4. Step 4: Simplify right side
    20,939.37x = 332,527,020.85
  5. Step 5: Solve for x
    x = 332,527,020.85/20,939.37
  6. Step 6: Final answer
    x = 15,880.47

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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.