Home / 20,919,900.92-28,871,804.23-12,664,515.38

Finding the Fourth Proportional to 20,919,900.92, 28,871,804.23 and 12,664,515.38

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Solution

The fourth proportional to 20,919,900.92, 28,871,804.23 and 12,664,515.38 is: 17,478,448.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,919,900.92 : 28,871,804.23 = 12,664,515.38 : x
  2. Step 2: Convert to fraction form
    20,919,900.92/28,871,804.23 = 12,664,515.38/x
  3. Step 3: Cross multiply
    20,919,900.92x = 28,871,804.23 × 12,664,515.38
  4. Step 4: Simplify right side
    20,919,900.92x = 365,647,408,543,163.75
  5. Step 5: Solve for x
    x = 365,647,408,543,163.75/20,919,900.92
  6. Step 6: Final answer
    x = 17,478,448.39

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.