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Finding the Fourth Proportional to 13,608,664.20, 20,412,996.30 and 11,215,211.40

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Solution

The fourth proportional to 13,608,664.20, 20,412,996.30 and 11,215,211.40 is: 16,822,817.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608,664.20 : 20,412,996.30 = 11,215,211.40 : x
  2. Step 2: Convert to fraction form
    13,608,664.20/20,412,996.30 = 11,215,211.40/x
  3. Step 3: Cross multiply
    13,608,664.20x = 20,412,996.30 × 11,215,211.40
  4. Step 4: Simplify right side
    13,608,664.20x = 228,936,068,811,917.84
  5. Step 5: Solve for x
    x = 228,936,068,811,917.84/13,608,664.20
  6. Step 6: Final answer
    x = 16,822,817.10

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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.