Home / 12,147.82-18,221.73-9,378.53

Finding the Fourth Proportional to 12,147.82, 18,221.73 and 9,378.53

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Solution

The fourth proportional to 12,147.82, 18,221.73 and 9,378.53 is: 14,067.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,147.82 : 18,221.73 = 9,378.53 : x
  2. Step 2: Convert to fraction form
    12,147.82/18,221.73 = 9,378.53/x
  3. Step 3: Cross multiply
    12,147.82x = 18,221.73 × 9,378.53
  4. Step 4: Simplify right side
    12,147.82x = 170,893,087.01
  5. Step 5: Solve for x
    x = 170,893,087.01/12,147.82
  6. Step 6: Final answer
    x = 14,067.80

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Similar ratio
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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.