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Finding the Fourth Proportional to 21,191.36, 29,243.52 and 11,759.68

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Solution

The fourth proportional to 21,191.36, 29,243.52 and 11,759.68 is: 16,228.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,191.36 : 29,243.52 = 11,759.68 : x
  2. Step 2: Convert to fraction form
    21,191.36/29,243.52 = 11,759.68/x
  3. Step 3: Cross multiply
    21,191.36x = 29,243.52 × 11,759.68
  4. Step 4: Simplify right side
    21,191.36x = 343,894,437.27
  5. Step 5: Solve for x
    x = 343,894,437.27/21,191.36
  6. Step 6: Final answer
    x = 16,228.05

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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.