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Finding the Fourth Proportional to 30,408.67, 41,992.86 and 28,751.95

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Solution

The fourth proportional to 30,408.67, 41,992.86 and 28,751.95 is: 39,705.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,408.67 : 41,992.86 = 28,751.95 : x
  2. Step 2: Convert to fraction form
    30,408.67/41,992.86 = 28,751.95/x
  3. Step 3: Cross multiply
    30,408.67x = 41,992.86 × 28,751.95
  4. Step 4: Simplify right side
    30,408.67x = 1,207,376,611.08
  5. Step 5: Solve for x
    x = 1,207,376,611.08/30,408.67
  6. Step 6: Final answer
    x = 39,705.01

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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.