Home / 21,960.54-30,305.78-11,889.19

Finding the Fourth Proportional to 21,960.54, 30,305.78 and 11,889.19

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Solution

The fourth proportional to 21,960.54, 30,305.78 and 11,889.19 is: 16,407.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.54 : 30,305.78 = 11,889.19 : x
  2. Step 2: Convert to fraction form
    21,960.54/30,305.78 = 11,889.19/x
  3. Step 3: Cross multiply
    21,960.54x = 30,305.78 × 11,889.19
  4. Step 4: Simplify right side
    21,960.54x = 360,311,244.12
  5. Step 5: Solve for x
    x = 360,311,244.12/21,960.54
  6. Step 6: Final answer
    x = 16,407.21

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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.