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Finding the Fourth Proportional to 13,971,960.40, 20,915,950.20 and 8,289,259.60

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Solution

The fourth proportional to 13,971,960.40, 20,915,950.20 and 8,289,259.60 is: 12,408,977.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,971,960.40 : 20,915,950.20 = 8,289,259.60 : x
  2. Step 2: Convert to fraction form
    13,971,960.40/20,915,950.20 = 8,289,259.60/x
  3. Step 3: Cross multiply
    13,971,960.40x = 20,915,950.20 × 8,289,259.60
  4. Step 4: Simplify right side
    13,971,960.40x = 173,377,740,988,471.91
  5. Step 5: Solve for x
    x = 173,377,740,988,471.91/13,971,960.40
  6. Step 6: Final answer
    x = 12,408,977.41

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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.