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Finding the Fourth Proportional to 21,761.94, 30,024.18 and 15,045.15

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Solution

The fourth proportional to 21,761.94, 30,024.18 and 15,045.15 is: 20,757.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,761.94 : 30,024.18 = 15,045.15 : x
  2. Step 2: Convert to fraction form
    21,761.94/30,024.18 = 15,045.15/x
  3. Step 3: Cross multiply
    21,761.94x = 30,024.18 × 15,045.15
  4. Step 4: Simplify right side
    21,761.94x = 451,718,291.73
  5. Step 5: Solve for x
    x = 451,718,291.73/21,761.94
  6. Step 6: Final answer
    x = 20,757.26

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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.