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Finding the Fourth Proportional to 30,211.95, 41,699.16 and 16,787.82

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Solution

The fourth proportional to 30,211.95, 41,699.16 and 16,787.82 is: 23,170.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,211.95 : 41,699.16 = 16,787.82 : x
  2. Step 2: Convert to fraction form
    30,211.95/41,699.16 = 16,787.82/x
  3. Step 3: Cross multiply
    30,211.95x = 41,699.16 × 16,787.82
  4. Step 4: Simplify right side
    30,211.95x = 700,037,992.23
  5. Step 5: Solve for x
    x = 700,037,992.23/30,211.95
  6. Step 6: Final answer
    x = 23,170.90

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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.