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Finding the Fourth Proportional to 18,621,968.80, 27,932,953.20 and 18,621,968.80

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Solution

The fourth proportional to 18,621,968.80, 27,932,953.20 and 18,621,968.80 is: 27,932,953.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,621,968.80 : 27,932,953.20 = 18,621,968.80 : x
  2. Step 2: Convert to fraction form
    18,621,968.80/27,932,953.20 = 18,621,968.80/x
  3. Step 3: Cross multiply
    18,621,968.80x = 27,932,953.20 × 18,621,968.80
  4. Step 4: Simplify right side
    18,621,968.80x = 520,166,582,982,260.19
  5. Step 5: Solve for x
    x = 520,166,582,982,260.19/18,621,968.80
  6. Step 6: Final answer
    x = 27,932,953.20

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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.