Home / 20,676.26-28,537.31-13,131.42

Finding the Fourth Proportional to 20,676.26, 28,537.31 and 13,131.42

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Solution

The fourth proportional to 20,676.26, 28,537.31 and 13,131.42 is: 18,123.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,676.26 : 28,537.31 = 13,131.42 : x
  2. Step 2: Convert to fraction form
    20,676.26/28,537.31 = 13,131.42/x
  3. Step 3: Cross multiply
    20,676.26x = 28,537.31 × 13,131.42
  4. Step 4: Simplify right side
    20,676.26x = 374,735,329.09
  5. Step 5: Solve for x
    x = 374,735,329.09/20,676.26
  6. Step 6: Final answer
    x = 18,123.94

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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.