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Finding the Fourth Proportional to 6,717.48, 9,270.81 and 3,885

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Solution

The fourth proportional to 6,717.48, 9,270.81 and 3,885 is: 5,361.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,717.48 : 9,270.81 = 3,885 : x
  2. Step 2: Convert to fraction form
    6,717.48/9,270.81 = 3,885/x
  3. Step 3: Cross multiply
    6,717.48x = 9,270.81 × 3,885
  4. Step 4: Simplify right side
    6,717.48x = 36,017,096.85
  5. Step 5: Solve for x
    x = 36,017,096.85/6,717.48
  6. Step 6: Final answer
    x = 5,361.70

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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.