Home / 21,722.37-29,976.37-12,161.53

Finding the Fourth Proportional to 21,722.37, 29,976.37 and 12,161.53

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Solution

The fourth proportional to 21,722.37, 29,976.37 and 12,161.53 is: 16,782.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,722.37 : 29,976.37 = 12,161.53 : x
  2. Step 2: Convert to fraction form
    21,722.37/29,976.37 = 12,161.53/x
  3. Step 3: Cross multiply
    21,722.37x = 29,976.37 × 12,161.53
  4. Step 4: Simplify right side
    21,722.37x = 364,558,523.05
  5. Step 5: Solve for x
    x = 364,558,523.05/21,722.37
  6. Step 6: Final answer
    x = 16,782.63

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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.