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Finding the Fourth Proportional to 13,675.17, 20,512.67 and 3,814.50

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Solution

The fourth proportional to 13,675.17, 20,512.67 and 3,814.50 is: 5,721.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,675.17 : 20,512.67 = 3,814.50 : x
  2. Step 2: Convert to fraction form
    13,675.17/20,512.67 = 3,814.50/x
  3. Step 3: Cross multiply
    13,675.17x = 20,512.67 × 3,814.50
  4. Step 4: Simplify right side
    13,675.17x = 78,245,560.64
  5. Step 5: Solve for x
    x = 78,245,560.64/13,675.17
  6. Step 6: Final answer
    x = 5,721.72

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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.