Home / 13,910.94-20,840.31-8,271.90

Finding the Fourth Proportional to 13,910.94, 20,840.31 and 8,271.90

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Solution

The fourth proportional to 13,910.94, 20,840.31 and 8,271.90 is: 12,392.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,910.94 : 20,840.31 = 8,271.90 : x
  2. Step 2: Convert to fraction form
    13,910.94/20,840.31 = 8,271.90/x
  3. Step 3: Cross multiply
    13,910.94x = 20,840.31 × 8,271.90
  4. Step 4: Simplify right side
    13,910.94x = 172,388,960.29
  5. Step 5: Solve for x
    x = 172,388,960.29/13,910.94
  6. Step 6: Final answer
    x = 12,392.33

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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.