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Finding the Fourth Proportional to 13,913.44, 20,863.48 and 6,511.68

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Solution

The fourth proportional to 13,913.44, 20,863.48 and 6,511.68 is: 9,764.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,913.44 : 20,863.48 = 6,511.68 : x
  2. Step 2: Convert to fraction form
    13,913.44/20,863.48 = 6,511.68/x
  3. Step 3: Cross multiply
    13,913.44x = 20,863.48 × 6,511.68
  4. Step 4: Simplify right side
    13,913.44x = 135,856,305.45
  5. Step 5: Solve for x
    x = 135,856,305.45/13,913.44
  6. Step 6: Final answer
    x = 9,764.39

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1.5x scale

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.