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Finding the Fourth Proportional to 21,453.59, 29,606.11 and 11,893.77

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Solution

The fourth proportional to 21,453.59, 29,606.11 and 11,893.77 is: 16,413.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,453.59 : 29,606.11 = 11,893.77 : x
  2. Step 2: Convert to fraction form
    21,453.59/29,606.11 = 11,893.77/x
  3. Step 3: Cross multiply
    21,453.59x = 29,606.11 × 11,893.77
  4. Step 4: Simplify right side
    21,453.59x = 352,128,233.20
  5. Step 5: Solve for x
    x = 352,128,233.20/21,453.59
  6. Step 6: Final answer
    x = 16,413.49

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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.