Home / 12,121.67-18,181.92-4,225.95

Finding the Fourth Proportional to 12,121.67, 18,181.92 and 4,225.95

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Solution

The fourth proportional to 12,121.67, 18,181.92 and 4,225.95 is: 6,338.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.67 : 18,181.92 = 4,225.95 : x
  2. Step 2: Convert to fraction form
    12,121.67/18,181.92 = 4,225.95/x
  3. Step 3: Cross multiply
    12,121.67x = 18,181.92 × 4,225.95
  4. Step 4: Simplify right side
    12,121.67x = 76,835,884.82
  5. Step 5: Solve for x
    x = 76,835,884.82/12,121.67
  6. Step 6: Final answer
    x = 6,338.72

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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.