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Finding the Fourth Proportional to 6,639.69, 9,163.10 and 3,655.49

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Solution

The fourth proportional to 6,639.69, 9,163.10 and 3,655.49 is: 5,044.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.69 : 9,163.10 = 3,655.49 : x
  2. Step 2: Convert to fraction form
    6,639.69/9,163.10 = 3,655.49/x
  3. Step 3: Cross multiply
    6,639.69x = 9,163.10 × 3,655.49
  4. Step 4: Simplify right side
    6,639.69x = 33,495,620.42
  5. Step 5: Solve for x
    x = 33,495,620.42/6,639.69
  6. Step 6: Final answer
    x = 5,044.76

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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.