Home / 18,972.12-28,408.50-12,379.80

Finding the Fourth Proportional to 18,972.12, 28,408.50 and 12,379.80

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Solution

The fourth proportional to 18,972.12, 28,408.50 and 12,379.80 is: 18,537.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,972.12 : 28,408.50 = 12,379.80 : x
  2. Step 2: Convert to fraction form
    18,972.12/28,408.50 = 12,379.80/x
  3. Step 3: Cross multiply
    18,972.12x = 28,408.50 × 12,379.80
  4. Step 4: Simplify right side
    18,972.12x = 351,691,548.30
  5. Step 5: Solve for x
    x = 351,691,548.30/18,972.12
  6. Step 6: Final answer
    x = 18,537.28

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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.