Home / 21,091.93-29,105.40-11,659.75

Finding the Fourth Proportional to 21,091.93, 29,105.40 and 11,659.75

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Solution

The fourth proportional to 21,091.93, 29,105.40 and 11,659.75 is: 16,089.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,091.93 : 29,105.40 = 11,659.75 : x
  2. Step 2: Convert to fraction form
    21,091.93/29,105.40 = 11,659.75/x
  3. Step 3: Cross multiply
    21,091.93x = 29,105.40 × 11,659.75
  4. Step 4: Simplify right side
    21,091.93x = 339,361,687.65
  5. Step 5: Solve for x
    x = 339,361,687.65/21,091.93
  6. Step 6: Final answer
    x = 16,089.65

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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.