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Finding the Fourth Proportional to 20,792.81, 28,694.16 and 11,361.57

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Solution

The fourth proportional to 20,792.81, 28,694.16 and 11,361.57 is: 15,679.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,792.81 : 28,694.16 = 11,361.57 : x
  2. Step 2: Convert to fraction form
    20,792.81/28,694.16 = 11,361.57/x
  3. Step 3: Cross multiply
    20,792.81x = 28,694.16 × 11,361.57
  4. Step 4: Simplify right side
    20,792.81x = 326,010,707.43
  5. Step 5: Solve for x
    x = 326,010,707.43/20,792.81
  6. Step 6: Final answer
    x = 15,679.01

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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.