Home / 12,309.49-18,466.94-3,990.34

Finding the Fourth Proportional to 12,309.49, 18,466.94 and 3,990.34

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Solution

The fourth proportional to 12,309.49, 18,466.94 and 3,990.34 is: 5,986.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,309.49 : 18,466.94 = 3,990.34 : x
  2. Step 2: Convert to fraction form
    12,309.49/18,466.94 = 3,990.34/x
  3. Step 3: Cross multiply
    12,309.49x = 18,466.94 × 3,990.34
  4. Step 4: Simplify right side
    12,309.49x = 73,689,369.36
  5. Step 5: Solve for x
    x = 73,689,369.36/12,309.49
  6. Step 6: Final answer
    x = 5,986.39

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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.