Home / 12,636.40-18,954.60-3,871.30

Finding the Fourth Proportional to 12,636.40, 18,954.60 and 3,871.30

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Solution

The fourth proportional to 12,636.40, 18,954.60 and 3,871.30 is: 5,806.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,636.40 : 18,954.60 = 3,871.30 : x
  2. Step 2: Convert to fraction form
    12,636.40/18,954.60 = 3,871.30/x
  3. Step 3: Cross multiply
    12,636.40x = 18,954.60 × 3,871.30
  4. Step 4: Simplify right side
    12,636.40x = 73,378,942.98
  5. Step 5: Solve for x
    x = 73,378,942.98/12,636.40
  6. Step 6: Final answer
    x = 5,806.95

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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.