Home / 16,121.72-22,236.78-13,137.56

Finding the Fourth Proportional to 16,121.72, 22,236.78 and 13,137.56

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Solution

The fourth proportional to 16,121.72, 22,236.78 and 13,137.56 is: 18,120.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,121.72 : 22,236.78 = 13,137.56 : x
  2. Step 2: Convert to fraction form
    16,121.72/22,236.78 = 13,137.56/x
  3. Step 3: Cross multiply
    16,121.72x = 22,236.78 × 13,137.56
  4. Step 4: Simplify right side
    16,121.72x = 292,137,031.46
  5. Step 5: Solve for x
    x = 292,137,031.46/16,121.72
  6. Step 6: Final answer
    x = 18,120.71

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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.