Home / 21,958.09-33,109.37-20,121.01

Finding the Fourth Proportional to 21,958.09, 33,109.37 and 20,121.01

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Solution

The fourth proportional to 21,958.09, 33,109.37 and 20,121.01 is: 30,339.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,958.09 : 33,109.37 = 20,121.01 : x
  2. Step 2: Convert to fraction form
    21,958.09/33,109.37 = 20,121.01/x
  3. Step 3: Cross multiply
    21,958.09x = 33,109.37 × 20,121.01
  4. Step 4: Simplify right side
    21,958.09x = 666,193,964.86
  5. Step 5: Solve for x
    x = 666,193,964.86/21,958.09
  6. Step 6: Final answer
    x = 30,339.34

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.