Home / 20,121.78-27,796.05-19,137.63

Finding the Fourth Proportional to 20,121.78, 27,796.05 and 19,137.63

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Solution

The fourth proportional to 20,121.78, 27,796.05 and 19,137.63 is: 26,436.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,121.78 : 27,796.05 = 19,137.63 : x
  2. Step 2: Convert to fraction form
    20,121.78/27,796.05 = 19,137.63/x
  3. Step 3: Cross multiply
    20,121.78x = 27,796.05 × 19,137.63
  4. Step 4: Simplify right side
    20,121.78x = 531,950,520.36
  5. Step 5: Solve for x
    x = 531,950,520.36/20,121.78
  6. Step 6: Final answer
    x = 26,436.55

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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.