Home / 21,960.64-30,305.78-11,889.09

Finding the Fourth Proportional to 21,960.64, 30,305.78 and 11,889.09

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Solution

The fourth proportional to 21,960.64, 30,305.78 and 11,889.09 is: 16,407.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,960.64 : 30,305.78 = 11,889.09 : x
  2. Step 2: Convert to fraction form
    21,960.64/30,305.78 = 11,889.09/x
  3. Step 3: Cross multiply
    21,960.64x = 30,305.78 × 11,889.09
  4. Step 4: Simplify right side
    21,960.64x = 360,308,145.94
  5. Step 5: Solve for x
    x = 360,308,145.94/21,960.64
  6. Step 6: Final answer
    x = 16,407.00

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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.