Home / 21,960.85-30,305.75-11,889.02

Finding the Fourth Proportional to 21,960.85, 30,305.75 and 11,889.02

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Solution

The fourth proportional to 21,960.85, 30,305.75 and 11,889.02 is: 16,406.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.85 : 30,305.75 = 11,889.02 : x
  2. Step 2: Convert to fraction form
    21,960.85/30,305.75 = 11,889.02/x
  3. Step 3: Cross multiply
    21,960.85x = 30,305.75 × 11,889.02
  4. Step 4: Simplify right side
    21,960.85x = 360,305,667.87
  5. Step 5: Solve for x
    x = 360,305,667.87/21,960.85
  6. Step 6: Final answer
    x = 16,406.73

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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.