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Finding the Fourth Proportional to 20,792.69, 28,694.62 and 11,361.86

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Solution

The fourth proportional to 20,792.69, 28,694.62 and 11,361.86 is: 15,679.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.69 : 28,694.62 = 11,361.86 : x
  2. Step 2: Convert to fraction form
    20,792.69/28,694.62 = 11,361.86/x
  3. Step 3: Cross multiply
    20,792.69x = 28,694.62 × 11,361.86
  4. Step 4: Simplify right side
    20,792.69x = 326,024,255.19
  5. Step 5: Solve for x
    x = 326,024,255.19/20,792.69
  6. Step 6: Final answer
    x = 15,679.75

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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.