Home / 12,169.36-18,259.72-11,972.80

Finding the Fourth Proportional to 12,169.36, 18,259.72 and 11,972.80

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Solution

The fourth proportional to 12,169.36, 18,259.72 and 11,972.80 is: 17,964.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,169.36 : 18,259.72 = 11,972.80 : x
  2. Step 2: Convert to fraction form
    12,169.36/18,259.72 = 11,972.80/x
  3. Step 3: Cross multiply
    12,169.36x = 18,259.72 × 11,972.80
  4. Step 4: Simplify right side
    12,169.36x = 218,619,975.62
  5. Step 5: Solve for x
    x = 218,619,975.62/12,169.36
  6. Step 6: Final answer
    x = 17,964.79

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.