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Finding the Fourth Proportional to 5,391.92, 7,440.92 and 3,153.28

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Solution

The fourth proportional to 5,391.92, 7,440.92 and 3,153.28 is: 4,351.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,391.92 : 7,440.92 = 3,153.28 : x
  2. Step 2: Convert to fraction form
    5,391.92/7,440.92 = 3,153.28/x
  3. Step 3: Cross multiply
    5,391.92x = 7,440.92 × 3,153.28
  4. Step 4: Simplify right side
    5,391.92x = 23,463,304.22
  5. Step 5: Solve for x
    x = 23,463,304.22/5,391.92
  6. Step 6: Final answer
    x = 4,351.57

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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.