Home / 21,273.44-31,920.08-8,121.47

Finding the Fourth Proportional to 21,273.44, 31,920.08 and 8,121.47

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Solution

The fourth proportional to 21,273.44, 31,920.08 and 8,121.47 is: 12,185.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,273.44 : 31,920.08 = 8,121.47 : x
  2. Step 2: Convert to fraction form
    21,273.44/31,920.08 = 8,121.47/x
  3. Step 3: Cross multiply
    21,273.44x = 31,920.08 × 8,121.47
  4. Step 4: Simplify right side
    21,273.44x = 259,237,771.91
  5. Step 5: Solve for x
    x = 259,237,771.91/21,273.44
  6. Step 6: Final answer
    x = 12,185.99

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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.