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Finding the Fourth Proportional to 12,982,694.20, 19,474,041.30 and 5,408,675.80

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Solution

The fourth proportional to 12,982,694.20, 19,474,041.30 and 5,408,675.80 is: 8,113,013.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,982,694.20 : 19,474,041.30 = 5,408,675.80 : x
  2. Step 2: Convert to fraction form
    12,982,694.20/19,474,041.30 = 5,408,675.80/x
  3. Step 3: Cross multiply
    12,982,694.20x = 19,474,041.30 × 5,408,675.80
  4. Step 4: Simplify right side
    12,982,694.20x = 105,328,775,907,510.55
  5. Step 5: Solve for x
    x = 105,328,775,907,510.55/12,982,694.20
  6. Step 6: Final answer
    x = 8,113,013.70

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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.