Home / 21,091.89-29,107.40-11,661.06

Finding the Fourth Proportional to 21,091.89, 29,107.40 and 11,661.06

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Solution

The fourth proportional to 21,091.89, 29,107.40 and 11,661.06 is: 16,092.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.89 : 29,107.40 = 11,661.06 : x
  2. Step 2: Convert to fraction form
    21,091.89/29,107.40 = 11,661.06/x
  3. Step 3: Cross multiply
    21,091.89x = 29,107.40 × 11,661.06
  4. Step 4: Simplify right side
    21,091.89x = 339,423,079.54
  5. Step 5: Solve for x
    x = 339,423,079.54/21,091.89
  6. Step 6: Final answer
    x = 16,092.59

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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.