Home / 21,936.56-30,270.12-12,984.44

Finding the Fourth Proportional to 21,936.56, 30,270.12 and 12,984.44

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Solution

The fourth proportional to 21,936.56, 30,270.12 and 12,984.44 is: 17,917.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,936.56 : 30,270.12 = 12,984.44 : x
  2. Step 2: Convert to fraction form
    21,936.56/30,270.12 = 12,984.44/x
  3. Step 3: Cross multiply
    21,936.56x = 30,270.12 × 12,984.44
  4. Step 4: Simplify right side
    21,936.56x = 393,040,556.93
  5. Step 5: Solve for x
    x = 393,040,556.93/21,936.56
  6. Step 6: Final answer
    x = 17,917.15

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.