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Finding the Fourth Proportional to 12,662.72, 18,994.08 and 3,429.44

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Solution

The fourth proportional to 12,662.72, 18,994.08 and 3,429.44 is: 5,144.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,662.72 : 18,994.08 = 3,429.44 : x
  2. Step 2: Convert to fraction form
    12,662.72/18,994.08 = 3,429.44/x
  3. Step 3: Cross multiply
    12,662.72x = 18,994.08 × 3,429.44
  4. Step 4: Simplify right side
    12,662.72x = 65,139,057.72
  5. Step 5: Solve for x
    x = 65,139,057.72/12,662.72
  6. Step 6: Final answer
    x = 5,144.16

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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.