Home / 12,145.86-18,219.84-3,380.88

Finding the Fourth Proportional to 12,145.86, 18,219.84 and 3,380.88

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Solution

The fourth proportional to 12,145.86, 18,219.84 and 3,380.88 is: 5,071.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.86 : 18,219.84 = 3,380.88 : x
  2. Step 2: Convert to fraction form
    12,145.86/18,219.84 = 3,380.88/x
  3. Step 3: Cross multiply
    12,145.86x = 18,219.84 × 3,380.88
  4. Step 4: Simplify right side
    12,145.86x = 61,599,092.66
  5. Step 5: Solve for x
    x = 61,599,092.66/12,145.86
  6. Step 6: Final answer
    x = 5,071.61

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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.