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Finding the Fourth Proportional to 28,490.94, 39,361.14 and 22,761

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Solution

The fourth proportional to 28,490.94, 39,361.14 and 22,761 is: 31,445.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,490.94 : 39,361.14 = 22,761 : x
  2. Step 2: Convert to fraction form
    28,490.94/39,361.14 = 22,761/x
  3. Step 3: Cross multiply
    28,490.94x = 39,361.14 × 22,761
  4. Step 4: Simplify right side
    28,490.94x = 895,898,907.54
  5. Step 5: Solve for x
    x = 895,898,907.54/28,490.94
  6. Step 6: Final answer
    x = 31,445.05

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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.