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Finding the Fourth Proportional to 8,682.60, 13,021.20 and 3,135.21

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Solution

The fourth proportional to 8,682.60, 13,021.20 and 3,135.21 is: 4,701.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,682.60 : 13,021.20 = 3,135.21 : x
  2. Step 2: Convert to fraction form
    8,682.60/13,021.20 = 3,135.21/x
  3. Step 3: Cross multiply
    8,682.60x = 13,021.20 × 3,135.21
  4. Step 4: Simplify right side
    8,682.60x = 40,824,196.45
  5. Step 5: Solve for x
    x = 40,824,196.45/8,682.60
  6. Step 6: Final answer
    x = 4,701.84

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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.