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Finding the Fourth Proportional to 21,676.09, 29,912.90 and 11,740.09

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Solution

The fourth proportional to 21,676.09, 29,912.90 and 11,740.09 is: 16,201.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,676.09 : 29,912.90 = 11,740.09 : x
  2. Step 2: Convert to fraction form
    21,676.09/29,912.90 = 11,740.09/x
  3. Step 3: Cross multiply
    21,676.09x = 29,912.90 × 11,740.09
  4. Step 4: Simplify right side
    21,676.09x = 351,180,079.46
  5. Step 5: Solve for x
    x = 351,180,079.46/21,676.09
  6. Step 6: Final answer
    x = 16,201.27

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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.