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Finding the Fourth Proportional to 8,682.40, 13,004.40 and 3,485.60

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Solution

The fourth proportional to 8,682.40, 13,004.40 and 3,485.60 is: 5,220.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.40 : 13,004.40 = 3,485.60 : x
  2. Step 2: Convert to fraction form
    8,682.40/13,004.40 = 3,485.60/x
  3. Step 3: Cross multiply
    8,682.40x = 13,004.40 × 3,485.60
  4. Step 4: Simplify right side
    8,682.40x = 45,328,136.64
  5. Step 5: Solve for x
    x = 45,328,136.64/8,682.40
  6. Step 6: Final answer
    x = 5,220.69

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.