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Finding the Fourth Proportional to 21,409.26, 29,544.78 and 11,980.04

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Solution

The fourth proportional to 21,409.26, 29,544.78 and 11,980.04 is: 16,532.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,409.26 : 29,544.78 = 11,980.04 : x
  2. Step 2: Convert to fraction form
    21,409.26/29,544.78 = 11,980.04/x
  3. Step 3: Cross multiply
    21,409.26x = 29,544.78 × 11,980.04
  4. Step 4: Simplify right side
    21,409.26x = 353,947,646.19
  5. Step 5: Solve for x
    x = 353,947,646.19/21,409.26
  6. Step 6: Final answer
    x = 16,532.46

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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.