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Finding the Fourth Proportional to 20,792.50, 28,694.28 and 11,361.67

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Solution

The fourth proportional to 20,792.50, 28,694.28 and 11,361.67 is: 15,679.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.50 : 28,694.28 = 11,361.67 : x
  2. Step 2: Convert to fraction form
    20,792.50/28,694.28 = 11,361.67/x
  3. Step 3: Cross multiply
    20,792.50x = 28,694.28 × 11,361.67
  4. Step 4: Simplify right side
    20,792.50x = 326,014,940.25
  5. Step 5: Solve for x
    x = 326,014,940.25/20,792.50
  6. Step 6: Final answer
    x = 15,679.45

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1.5x scale

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.