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Finding the Fourth Proportional to 11,207,821.20, 16,811,731.80 and 11,207,821.20

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Solution

The fourth proportional to 11,207,821.20, 16,811,731.80 and 11,207,821.20 is: 16,811,731.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,207,821.20 : 16,811,731.80 = 11,207,821.20 : x
  2. Step 2: Convert to fraction form
    11,207,821.20/16,811,731.80 = 11,207,821.20/x
  3. Step 3: Cross multiply
    11,207,821.20x = 16,811,731.80 × 11,207,821.20
  4. Step 4: Simplify right side
    11,207,821.20x = 188,422,884,076,754.16
  5. Step 5: Solve for x
    x = 188,422,884,076,754.16/11,207,821.20
  6. Step 6: Final answer
    x = 16,811,731.80

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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.