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Finding the Fourth Proportional to 18,863,138.70, 28,294,708.05 and 18,863,138.70

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Solution

The fourth proportional to 18,863,138.70, 28,294,708.05 and 18,863,138.70 is: 28,294,708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,863,138.70 : 28,294,708.05 = 18,863,138.70 : x
  2. Step 2: Convert to fraction form
    18,863,138.70/28,294,708.05 = 18,863,138.70/x
  3. Step 3: Cross multiply
    18,863,138.70x = 28,294,708.05 × 18,863,138.70
  4. Step 4: Simplify right side
    18,863,138.70x = 533,727,002,423,156.50
  5. Step 5: Solve for x
    x = 533,727,002,423,156.50/18,863,138.70
  6. Step 6: Final answer
    x = 28,294,708.05

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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.