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Finding the Fourth Proportional to 21,748, 30,012.24 and 11,812

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Solution

The fourth proportional to 21,748, 30,012.24 and 11,812 is: 16,300.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748 : 30,012.24 = 11,812 : x
  2. Step 2: Convert to fraction form
    21,748/30,012.24 = 11,812/x
  3. Step 3: Cross multiply
    21,748x = 30,012.24 × 11,812
  4. Step 4: Simplify right side
    21,748x = 354,504,578.88
  5. Step 5: Solve for x
    x = 354,504,578.88/21,748
  6. Step 6: Final answer
    x = 16,300.56

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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.