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Finding the Fourth Proportional to 8,951.41, 13,408.35 and 8,638.39

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Solution

The fourth proportional to 8,951.41, 13,408.35 and 8,638.39 is: 12,939.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,951.41 : 13,408.35 = 8,638.39 : x
  2. Step 2: Convert to fraction form
    8,951.41/13,408.35 = 8,638.39/x
  3. Step 3: Cross multiply
    8,951.41x = 13,408.35 × 8,638.39
  4. Step 4: Simplify right side
    8,951.41x = 115,826,556.56
  5. Step 5: Solve for x
    x = 115,826,556.56/8,951.41
  6. Step 6: Final answer
    x = 12,939.48

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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.