Home / 18,691.05-25,790.70-11,137.20

Finding the Fourth Proportional to 18,691.05, 25,790.70 and 11,137.20

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Solution

The fourth proportional to 18,691.05, 25,790.70 and 11,137.20 is: 15,367.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691.05 : 25,790.70 = 11,137.20 : x
  2. Step 2: Convert to fraction form
    18,691.05/25,790.70 = 11,137.20/x
  3. Step 3: Cross multiply
    18,691.05x = 25,790.70 × 11,137.20
  4. Step 4: Simplify right side
    18,691.05x = 287,236,129.09
  5. Step 5: Solve for x
    x = 287,236,129.09/18,691.05
  6. Step 6: Final answer
    x = 15,367.57

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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.