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Finding the Fourth Proportional to 18,443,019.20, 27,664,528.80 and 17,911,578.20

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Solution

The fourth proportional to 18,443,019.20, 27,664,528.80 and 17,911,578.20 is: 26,867,367.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,443,019.20 : 27,664,528.80 = 17,911,578.20 : x
  2. Step 2: Convert to fraction form
    18,443,019.20/27,664,528.80 = 17,911,578.20/x
  3. Step 3: Cross multiply
    18,443,019.20x = 27,664,528.80 × 17,911,578.20
  4. Step 4: Simplify right side
    18,443,019.20x = 495,515,370,967,352.12
  5. Step 5: Solve for x
    x = 495,515,370,967,352.12/18,443,019.20
  6. Step 6: Final answer
    x = 26,867,367.30

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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.