Home / 12,405.78-18,611.70-6,168.73

Finding the Fourth Proportional to 12,405.78, 18,611.70 and 6,168.73

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Solution

The fourth proportional to 12,405.78, 18,611.70 and 6,168.73 is: 9,254.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,405.78 : 18,611.70 = 6,168.73 : x
  2. Step 2: Convert to fraction form
    12,405.78/18,611.70 = 6,168.73/x
  3. Step 3: Cross multiply
    12,405.78x = 18,611.70 × 6,168.73
  4. Step 4: Simplify right side
    12,405.78x = 114,810,552.14
  5. Step 5: Solve for x
    x = 114,810,552.14/12,405.78
  6. Step 6: Final answer
    x = 9,254.60

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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.