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Finding the Fourth Proportional to 11,274.60, 16,911.90 and 8,520.60

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Solution

The fourth proportional to 11,274.60, 16,911.90 and 8,520.60 is: 12,780.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,274.60 : 16,911.90 = 8,520.60 : x
  2. Step 2: Convert to fraction form
    11,274.60/16,911.90 = 8,520.60/x
  3. Step 3: Cross multiply
    11,274.60x = 16,911.90 × 8,520.60
  4. Step 4: Simplify right side
    11,274.60x = 144,099,535.14
  5. Step 5: Solve for x
    x = 144,099,535.14/11,274.60
  6. Step 6: Final answer
    x = 12,780.90

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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.