Home / 12,181.24-18,271.80-4,390

Finding the Fourth Proportional to 12,181.24, 18,271.80 and 4,390

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Solution

The fourth proportional to 12,181.24, 18,271.80 and 4,390 is: 6,584.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,181.24 : 18,271.80 = 4,390 : x
  2. Step 2: Convert to fraction form
    12,181.24/18,271.80 = 4,390/x
  3. Step 3: Cross multiply
    12,181.24x = 18,271.80 × 4,390
  4. Step 4: Simplify right side
    12,181.24x = 80,213,202
  5. Step 5: Solve for x
    x = 80,213,202/12,181.24
  6. Step 6: Final answer
    x = 6,584.98

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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.