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Finding the Fourth Proportional to 8,778.60, 12,103.78 and 8,269.80

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Solution

The fourth proportional to 8,778.60, 12,103.78 and 8,269.80 is: 11,402.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,778.60 : 12,103.78 = 8,269.80 : x
  2. Step 2: Convert to fraction form
    8,778.60/12,103.78 = 8,269.80/x
  3. Step 3: Cross multiply
    8,778.60x = 12,103.78 × 8,269.80
  4. Step 4: Simplify right side
    8,778.60x = 100,095,839.84
  5. Step 5: Solve for x
    x = 100,095,839.84/8,778.60
  6. Step 6: Final answer
    x = 11,402.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.