Home / 12,121.14-16,727.40-7,085.79

Finding the Fourth Proportional to 12,121.14, 16,727.40 and 7,085.79

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Solution

The fourth proportional to 12,121.14, 16,727.40 and 7,085.79 is: 9,778.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.14 : 16,727.40 = 7,085.79 : x
  2. Step 2: Convert to fraction form
    12,121.14/16,727.40 = 7,085.79/x
  3. Step 3: Cross multiply
    12,121.14x = 16,727.40 × 7,085.79
  4. Step 4: Simplify right side
    12,121.14x = 118,526,843.65
  5. Step 5: Solve for x
    x = 118,526,843.65/12,121.14
  6. Step 6: Final answer
    x = 9,778.52

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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.