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Finding the Fourth Proportional to 21,223, 29,290.44 and 12,839.56

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Solution

The fourth proportional to 21,223, 29,290.44 and 12,839.56 is: 17,720.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,223 : 29,290.44 = 12,839.56 : x
  2. Step 2: Convert to fraction form
    21,223/29,290.44 = 12,839.56/x
  3. Step 3: Cross multiply
    21,223x = 29,290.44 × 12,839.56
  4. Step 4: Simplify right side
    21,223x = 376,076,361.81
  5. Step 5: Solve for x
    x = 376,076,361.81/21,223
  6. Step 6: Final answer
    x = 17,720.23

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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.