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Finding the Fourth Proportional to 21,653, 29,881.32 and 11,717

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Solution

The fourth proportional to 21,653, 29,881.32 and 11,717 is: 16,169.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653 : 29,881.32 = 11,717 : x
  2. Step 2: Convert to fraction form
    21,653/29,881.32 = 11,717/x
  3. Step 3: Cross multiply
    21,653x = 29,881.32 × 11,717
  4. Step 4: Simplify right side
    21,653x = 350,119,426.44
  5. Step 5: Solve for x
    x = 350,119,426.44/21,653
  6. Step 6: Final answer
    x = 16,169.56

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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.