Home / 21,273.66-31,933.62-12,398.61

Finding the Fourth Proportional to 21,273.66, 31,933.62 and 12,398.61

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Solution

The fourth proportional to 21,273.66, 31,933.62 and 12,398.61 is: 18,611.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.66 : 31,933.62 = 12,398.61 : x
  2. Step 2: Convert to fraction form
    21,273.66/31,933.62 = 12,398.61/x
  3. Step 3: Cross multiply
    21,273.66x = 31,933.62 × 12,398.61
  4. Step 4: Simplify right side
    21,273.66x = 395,932,500.27
  5. Step 5: Solve for x
    x = 395,932,500.27/21,273.66
  6. Step 6: Final answer
    x = 18,611.40

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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.