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Finding the Fourth Proportional to 5,643.76, 7,789.16 and 3,286.64

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Solution

The fourth proportional to 5,643.76, 7,789.16 and 3,286.64 is: 4,536.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,643.76 : 7,789.16 = 3,286.64 : x
  2. Step 2: Convert to fraction form
    5,643.76/7,789.16 = 3,286.64/x
  3. Step 3: Cross multiply
    5,643.76x = 7,789.16 × 3,286.64
  4. Step 4: Simplify right side
    5,643.76x = 25,600,164.82
  5. Step 5: Solve for x
    x = 25,600,164.82/5,643.76
  6. Step 6: Final answer
    x = 4,536.01

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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.