Home / 12,629.40-18,942.30-4,309.80

Finding the Fourth Proportional to 12,629.40, 18,942.30 and 4,309.80

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Solution

The fourth proportional to 12,629.40, 18,942.30 and 4,309.80 is: 6,464.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,629.40 : 18,942.30 = 4,309.80 : x
  2. Step 2: Convert to fraction form
    12,629.40/18,942.30 = 4,309.80/x
  3. Step 3: Cross multiply
    12,629.40x = 18,942.30 × 4,309.80
  4. Step 4: Simplify right side
    12,629.40x = 81,637,524.54
  5. Step 5: Solve for x
    x = 81,637,524.54/12,629.40
  6. Step 6: Final answer
    x = 6,464.09

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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.