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Finding the Fourth Proportional to 12,165.21, 18,241.31 and 3,730.21

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Solution

The fourth proportional to 12,165.21, 18,241.31 and 3,730.21 is: 5,593.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,165.21 : 18,241.31 = 3,730.21 : x
  2. Step 2: Convert to fraction form
    12,165.21/18,241.31 = 3,730.21/x
  3. Step 3: Cross multiply
    12,165.21x = 18,241.31 × 3,730.21
  4. Step 4: Simplify right side
    12,165.21x = 68,043,880.70
  5. Step 5: Solve for x
    x = 68,043,880.70/12,165.21
  6. Step 6: Final answer
    x = 5,593.32

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1.5x scale

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.