Home / 12,990.15-19,481.04-4,222.98

Finding the Fourth Proportional to 12,990.15, 19,481.04 and 4,222.98

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Solution

The fourth proportional to 12,990.15, 19,481.04 and 4,222.98 is: 6,333.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,990.15 : 19,481.04 = 4,222.98 : x
  2. Step 2: Convert to fraction form
    12,990.15/19,481.04 = 4,222.98/x
  3. Step 3: Cross multiply
    12,990.15x = 19,481.04 × 4,222.98
  4. Step 4: Simplify right side
    12,990.15x = 82,268,042.30
  5. Step 5: Solve for x
    x = 82,268,042.30/12,990.15
  6. Step 6: Final answer
    x = 6,333.11

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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.