Home / 13,940.82-20,918.43-5,621.76

Finding the Fourth Proportional to 13,940.82, 20,918.43 and 5,621.76

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Solution

The fourth proportional to 13,940.82, 20,918.43 and 5,621.76 is: 8,435.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,940.82 : 20,918.43 = 5,621.76 : x
  2. Step 2: Convert to fraction form
    13,940.82/20,918.43 = 5,621.76/x
  3. Step 3: Cross multiply
    13,940.82x = 20,918.43 × 5,621.76
  4. Step 4: Simplify right side
    13,940.82x = 117,598,393.04
  5. Step 5: Solve for x
    x = 117,598,393.04/13,940.82
  6. Step 6: Final answer
    x = 8,435.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.