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Finding the Fourth Proportional to 19,191,491.20, 28,802,983.20 and 18,561,635.20

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Solution

The fourth proportional to 19,191,491.20, 28,802,983.20 and 18,561,635.20 is: 27,857,682.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,191,491.20 : 28,802,983.20 = 18,561,635.20 : x
  2. Step 2: Convert to fraction form
    19,191,491.20/28,802,983.20 = 18,561,635.20/x
  3. Step 3: Cross multiply
    19,191,491.20x = 28,802,983.20 × 18,561,635.20
  4. Step 4: Simplify right side
    19,191,491.20x = 534,630,466,830,128.62
  5. Step 5: Solve for x
    x = 534,630,466,830,128.62/19,191,491.20
  6. Step 6: Final answer
    x = 27,857,682.41

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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.