Home / 13,721.83-20,610.30-8,185.98

Finding the Fourth Proportional to 13,721.83, 20,610.30 and 8,185.98

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Solution

The fourth proportional to 13,721.83, 20,610.30 and 8,185.98 is: 12,295.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.83 : 20,610.30 = 8,185.98 : x
  2. Step 2: Convert to fraction form
    13,721.83/20,610.30 = 8,185.98/x
  3. Step 3: Cross multiply
    13,721.83x = 20,610.30 × 8,185.98
  4. Step 4: Simplify right side
    13,721.83x = 168,715,503.59
  5. Step 5: Solve for x
    x = 168,715,503.59/13,721.83
  6. Step 6: Final answer
    x = 12,295.41

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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.