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Finding the Fourth Proportional to 6,921.28, 9,551.28 and 3,777.64

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Solution

The fourth proportional to 6,921.28, 9,551.28 and 3,777.64 is: 5,213.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.28 : 9,551.28 = 3,777.64 : x
  2. Step 2: Convert to fraction form
    6,921.28/9,551.28 = 3,777.64/x
  3. Step 3: Cross multiply
    6,921.28x = 9,551.28 × 3,777.64
  4. Step 4: Simplify right side
    6,921.28x = 36,081,297.38
  5. Step 5: Solve for x
    x = 36,081,297.38/6,921.28
  6. Step 6: Final answer
    x = 5,213.10

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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.