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Finding the Fourth Proportional to 21,453.89, 29,605.88 and 11,893.73

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Solution

The fourth proportional to 21,453.89, 29,605.88 and 11,893.73 is: 16,413.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,453.89 : 29,605.88 = 11,893.73 : x
  2. Step 2: Convert to fraction form
    21,453.89/29,605.88 = 11,893.73/x
  3. Step 3: Cross multiply
    21,453.89x = 29,605.88 × 11,893.73
  4. Step 4: Simplify right side
    21,453.89x = 352,124,135.63
  5. Step 5: Solve for x
    x = 352,124,135.63/21,453.89
  6. Step 6: Final answer
    x = 16,413.07

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1.5x scale

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.