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Finding the Fourth Proportional to 18,904,860.60, 28,391,505.30 and 16,553,398.20

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Solution

The fourth proportional to 18,904,860.60, 28,391,505.30 and 16,553,398.20 is: 24,860,055.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,904,860.60 : 28,391,505.30 = 16,553,398.20 : x
  2. Step 2: Convert to fraction form
    18,904,860.60/28,391,505.30 = 16,553,398.20/x
  3. Step 3: Cross multiply
    18,904,860.60x = 28,391,505.30 × 16,553,398.20
  4. Step 4: Simplify right side
    18,904,860.60x = 469,975,892,728,310.44
  5. Step 5: Solve for x
    x = 469,975,892,728,310.44/18,904,860.60
  6. Step 6: Final answer
    x = 24,860,055.98

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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.