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Finding the Fourth Proportional to 18,704,593.80, 28,056,890.70 and 17,665,331.40

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Solution

The fourth proportional to 18,704,593.80, 28,056,890.70 and 17,665,331.40 is: 26,497,997.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,704,593.80 : 28,056,890.70 = 17,665,331.40 : x
  2. Step 2: Convert to fraction form
    18,704,593.80/28,056,890.70 = 17,665,331.40/x
  3. Step 3: Cross multiply
    18,704,593.80x = 28,056,890.70 × 17,665,331.40
  4. Step 4: Simplify right side
    18,704,593.80x = 495,634,272,269,077.94
  5. Step 5: Solve for x
    x = 495,634,272,269,077.94/18,704,593.80
  6. Step 6: Final answer
    x = 26,497,997.10

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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.