Home / 20,936.22-31,405.41-5,353.98

Finding the Fourth Proportional to 20,936.22, 31,405.41 and 5,353.98

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Solution

The fourth proportional to 20,936.22, 31,405.41 and 5,353.98 is: 8,031.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.22 : 31,405.41 = 5,353.98 : x
  2. Step 2: Convert to fraction form
    20,936.22/31,405.41 = 5,353.98/x
  3. Step 3: Cross multiply
    20,936.22x = 31,405.41 × 5,353.98
  4. Step 4: Simplify right side
    20,936.22x = 168,143,937.03
  5. Step 5: Solve for x
    x = 168,143,937.03/20,936.22
  6. Step 6: Final answer
    x = 8,031.25

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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.