Home / 12,211-18,315.58-3,890.68

Finding the Fourth Proportional to 12,211, 18,315.58 and 3,890.68

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Solution

The fourth proportional to 12,211, 18,315.58 and 3,890.68 is: 5,835.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,211 : 18,315.58 = 3,890.68 : x
  2. Step 2: Convert to fraction form
    12,211/18,315.58 = 3,890.68/x
  3. Step 3: Cross multiply
    12,211x = 18,315.58 × 3,890.68
  4. Step 4: Simplify right side
    12,211x = 71,260,060.79
  5. Step 5: Solve for x
    x = 71,260,060.79/12,211
  6. Step 6: Final answer
    x = 5,835.73

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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.