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Finding the Fourth Proportional to 6,641.60, 9,165.81 and 3,658.09

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Solution

The fourth proportional to 6,641.60, 9,165.81 and 3,658.09 is: 5,048.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,641.60 : 9,165.81 = 3,658.09 : x
  2. Step 2: Convert to fraction form
    6,641.60/9,165.81 = 3,658.09/x
  3. Step 3: Cross multiply
    6,641.60x = 9,165.81 × 3,658.09
  4. Step 4: Simplify right side
    6,641.60x = 33,529,319.54
  5. Step 5: Solve for x
    x = 33,529,319.54/6,641.60
  6. Step 6: Final answer
    x = 5,048.38

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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.