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Finding the Fourth Proportional to 28,991.88, 43,502.42 and 21,611.16

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Solution

The fourth proportional to 28,991.88, 43,502.42 and 21,611.16 is: 32,427.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,991.88 : 43,502.42 = 21,611.16 : x
  2. Step 2: Convert to fraction form
    28,991.88/43,502.42 = 21,611.16/x
  3. Step 3: Cross multiply
    28,991.88x = 43,502.42 × 21,611.16
  4. Step 4: Simplify right side
    28,991.88x = 940,137,759.01
  5. Step 5: Solve for x
    x = 940,137,759.01/28,991.88
  6. Step 6: Final answer
    x = 32,427.62

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.