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Finding the Fourth Proportional to 18,693,873.20, 28,040,809.80 and 10,603,722.80

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Solution

The fourth proportional to 18,693,873.20, 28,040,809.80 and 10,603,722.80 is: 15,905,584.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,693,873.20 : 28,040,809.80 = 10,603,722.80 : x
  2. Step 2: Convert to fraction form
    18,693,873.20/28,040,809.80 = 10,603,722.80/x
  3. Step 3: Cross multiply
    18,693,873.20x = 28,040,809.80 × 10,603,722.80
  4. Step 4: Simplify right side
    18,693,873.20x = 297,336,974,206,723.50
  5. Step 5: Solve for x
    x = 297,336,974,206,723.50/18,693,873.20
  6. Step 6: Final answer
    x = 15,905,584.20

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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.