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Finding the Fourth Proportional to 18,783,411.60, 28,209,331.80 and 16,431,949.20

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Solution

The fourth proportional to 18,783,411.60, 28,209,331.80 and 16,431,949.20 is: 24,677,854.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,783,411.60 : 28,209,331.80 = 16,431,949.20 : x
  2. Step 2: Convert to fraction form
    18,783,411.60/28,209,331.80 = 16,431,949.20/x
  3. Step 3: Cross multiply
    18,783,411.60x = 28,209,331.80 × 16,431,949.20
  4. Step 4: Simplify right side
    18,783,411.60x = 463,534,307,103,544.56
  5. Step 5: Solve for x
    x = 463,534,307,103,544.56/18,783,411.60
  6. Step 6: Final answer
    x = 24,677,854.96

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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.