Home / 21,939.26-30,273.55-12,378.42

Finding the Fourth Proportional to 21,939.26, 30,273.55 and 12,378.42

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Solution

The fourth proportional to 21,939.26, 30,273.55 and 12,378.42 is: 17,080.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.26 : 30,273.55 = 12,378.42 : x
  2. Step 2: Convert to fraction form
    21,939.26/30,273.55 = 12,378.42/x
  3. Step 3: Cross multiply
    21,939.26x = 30,273.55 × 12,378.42
  4. Step 4: Simplify right side
    21,939.26x = 374,738,685.84
  5. Step 5: Solve for x
    x = 374,738,685.84/21,939.26
  6. Step 6: Final answer
    x = 17,080.74

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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.