Home / 20,936.88-31,408.56-13,033.31

Finding the Fourth Proportional to 20,936.88, 31,408.56 and 13,033.31

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Solution

The fourth proportional to 20,936.88, 31,408.56 and 13,033.31 is: 19,551.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.88 : 31,408.56 = 13,033.31 : x
  2. Step 2: Convert to fraction form
    20,936.88/31,408.56 = 13,033.31/x
  3. Step 3: Cross multiply
    20,936.88x = 31,408.56 × 13,033.31
  4. Step 4: Simplify right side
    20,936.88x = 409,357,342.09
  5. Step 5: Solve for x
    x = 409,357,342.09/20,936.88
  6. Step 6: Final answer
    x = 19,551.97

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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.