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Finding the Fourth Proportional to 21,605.94, 29,816.21 and 11,669.94

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Solution

The fourth proportional to 21,605.94, 29,816.21 and 11,669.94 is: 16,104.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,605.94 : 29,816.21 = 11,669.94 : x
  2. Step 2: Convert to fraction form
    21,605.94/29,816.21 = 11,669.94/x
  3. Step 3: Cross multiply
    21,605.94x = 29,816.21 × 11,669.94
  4. Step 4: Simplify right side
    21,605.94x = 347,953,381.73
  5. Step 5: Solve for x
    x = 347,953,381.73/21,605.94
  6. Step 6: Final answer
    x = 16,104.52

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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.