Home / 18,517.80-25,538.34-13,129.56

Finding the Fourth Proportional to 18,517.80, 25,538.34 and 13,129.56

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Solution

The fourth proportional to 18,517.80, 25,538.34 and 13,129.56 is: 18,107.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,517.80 : 25,538.34 = 13,129.56 : x
  2. Step 2: Convert to fraction form
    18,517.80/25,538.34 = 13,129.56/x
  3. Step 3: Cross multiply
    18,517.80x = 25,538.34 × 13,129.56
  4. Step 4: Simplify right side
    18,517.80x = 335,307,167.33
  5. Step 5: Solve for x
    x = 335,307,167.33/18,517.80
  6. Step 6: Final answer
    x = 18,107.29

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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.