Home / 21,749.82-30,016.86-12,191.33

Finding the Fourth Proportional to 21,749.82, 30,016.86 and 12,191.33

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Solution

The fourth proportional to 21,749.82, 30,016.86 and 12,191.33 is: 16,825.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,749.82 : 30,016.86 = 12,191.33 : x
  2. Step 2: Convert to fraction form
    21,749.82/30,016.86 = 12,191.33/x
  3. Step 3: Cross multiply
    21,749.82x = 30,016.86 × 12,191.33
  4. Step 4: Simplify right side
    21,749.82x = 365,945,520.87
  5. Step 5: Solve for x
    x = 365,945,520.87/21,749.82
  6. Step 6: Final answer
    x = 16,825.22

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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.