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Finding the Fourth Proportional to 21,759.36, 30,033.36 and 13,371

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Solution

The fourth proportional to 21,759.36, 30,033.36 and 13,371 is: 18,455.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,759.36 : 30,033.36 = 13,371 : x
  2. Step 2: Convert to fraction form
    21,759.36/30,033.36 = 13,371/x
  3. Step 3: Cross multiply
    21,759.36x = 30,033.36 × 13,371
  4. Step 4: Simplify right side
    21,759.36x = 401,576,056.56
  5. Step 5: Solve for x
    x = 401,576,056.56/21,759.36
  6. Step 6: Final answer
    x = 18,455.32

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Why These Related Problems?

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