Home / 21,107.72-29,128.46-11,676.08

Finding the Fourth Proportional to 21,107.72, 29,128.46 and 11,676.08

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Solution

The fourth proportional to 21,107.72, 29,128.46 and 11,676.08 is: 16,112.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,107.72 : 29,128.46 = 11,676.08 : x
  2. Step 2: Convert to fraction form
    21,107.72/29,128.46 = 11,676.08/x
  3. Step 3: Cross multiply
    21,107.72x = 29,128.46 × 11,676.08
  4. Step 4: Simplify right side
    21,107.72x = 340,106,229.24
  5. Step 5: Solve for x
    x = 340,106,229.24/21,107.72
  6. Step 6: Final answer
    x = 16,112.88

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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.