Home / 20,201.84-27,872.16-15,939.44

Finding the Fourth Proportional to 20,201.84, 27,872.16 and 15,939.44

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Solution

The fourth proportional to 20,201.84, 27,872.16 and 15,939.44 is: 21,991.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,201.84 : 27,872.16 = 15,939.44 : x
  2. Step 2: Convert to fraction form
    20,201.84/27,872.16 = 15,939.44/x
  3. Step 3: Cross multiply
    20,201.84x = 27,872.16 × 15,939.44
  4. Step 4: Simplify right side
    20,201.84x = 444,266,621.99
  5. Step 5: Solve for x
    x = 444,266,621.99/20,201.84
  6. Step 6: Final answer
    x = 21,991.39

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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.