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Finding the Fourth Proportional to 6,639.88, 9,163.08 and 3,655.64

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Solution

The fourth proportional to 6,639.88, 9,163.08 and 3,655.64 is: 5,044.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.88 : 9,163.08 = 3,655.64 : x
  2. Step 2: Convert to fraction form
    6,639.88/9,163.08 = 3,655.64/x
  3. Step 3: Cross multiply
    6,639.88x = 9,163.08 × 3,655.64
  4. Step 4: Simplify right side
    6,639.88x = 33,496,921.77
  5. Step 5: Solve for x
    x = 33,496,921.77/6,639.88
  6. Step 6: Final answer
    x = 5,044.81

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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.