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Finding the Fourth Proportional to 6,984.36, 9,638.28 and 3,840.48

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Solution

The fourth proportional to 6,984.36, 9,638.28 and 3,840.48 is: 5,299.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,984.36 : 9,638.28 = 3,840.48 : x
  2. Step 2: Convert to fraction form
    6,984.36/9,638.28 = 3,840.48/x
  3. Step 3: Cross multiply
    6,984.36x = 9,638.28 × 3,840.48
  4. Step 4: Simplify right side
    6,984.36x = 37,015,621.57
  5. Step 5: Solve for x
    x = 37,015,621.57/6,984.36
  6. Step 6: Final answer
    x = 5,299.79

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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.