Home / 20,738.30-28,609.82-13,180.58

Finding the Fourth Proportional to 20,738.30, 28,609.82 and 13,180.58

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Solution

The fourth proportional to 20,738.30, 28,609.82 and 13,180.58 is: 18,183.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,738.30 : 28,609.82 = 13,180.58 : x
  2. Step 2: Convert to fraction form
    20,738.30/28,609.82 = 13,180.58/x
  3. Step 3: Cross multiply
    20,738.30x = 28,609.82 × 13,180.58
  4. Step 4: Simplify right side
    20,738.30x = 377,094,021.30
  5. Step 5: Solve for x
    x = 377,094,021.30/20,738.30
  6. Step 6: Final answer
    x = 18,183.46

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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.