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Finding the Fourth Proportional to 18,691,811.10, 28,018,363.05 and 10,154,108.70

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Solution

The fourth proportional to 18,691,811.10, 28,018,363.05 and 10,154,108.70 is: 15,220,649.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,691,811.10 : 28,018,363.05 = 10,154,108.70 : x
  2. Step 2: Convert to fraction form
    18,691,811.10/28,018,363.05 = 10,154,108.70/x
  3. Step 3: Cross multiply
    18,691,811.10x = 28,018,363.05 × 10,154,108.70
  4. Step 4: Simplify right side
    18,691,811.10x = 284,501,504,005,763.50
  5. Step 5: Solve for x
    x = 284,501,504,005,763.50/18,691,811.10
  6. Step 6: Final answer
    x = 15,220,649.43

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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.