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Finding the Fourth Proportional to 18,442,859.20, 27,664,288.80 and 17,911,418.20

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Solution

The fourth proportional to 18,442,859.20, 27,664,288.80 and 17,911,418.20 is: 26,867,127.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,442,859.20 : 27,664,288.80 = 17,911,418.20 : x
  2. Step 2: Convert to fraction form
    18,442,859.20/27,664,288.80 = 17,911,418.20/x
  3. Step 3: Cross multiply
    18,442,859.20x = 27,664,288.80 × 17,911,418.20
  4. Step 4: Simplify right side
    18,442,859.20x = 495,506,645,902,376.12
  5. Step 5: Solve for x
    x = 495,506,645,902,376.12/18,442,859.20
  6. Step 6: Final answer
    x = 26,867,127.30

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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.