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Finding the Fourth Proportional to 21,653.31, 29,881.66 and 11,717.31

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Solution

The fourth proportional to 21,653.31, 29,881.66 and 11,717.31 is: 16,169.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,653.31 : 29,881.66 = 11,717.31 : x
  2. Step 2: Convert to fraction form
    21,653.31/29,881.66 = 11,717.31/x
  3. Step 3: Cross multiply
    21,653.31x = 29,881.66 × 11,717.31
  4. Step 4: Simplify right side
    21,653.31x = 350,132,673.53
  5. Step 5: Solve for x
    x = 350,132,673.53/21,653.31
  6. Step 6: Final answer
    x = 16,169.94

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.