Home / 12,129.09-18,193.49-4,231.59

Finding the Fourth Proportional to 12,129.09, 18,193.49 and 4,231.59

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Solution

The fourth proportional to 12,129.09, 18,193.49 and 4,231.59 is: 6,347.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,129.09 : 18,193.49 = 4,231.59 : x
  2. Step 2: Convert to fraction form
    12,129.09/18,193.49 = 4,231.59/x
  3. Step 3: Cross multiply
    12,129.09x = 18,193.49 × 4,231.59
  4. Step 4: Simplify right side
    12,129.09x = 76,987,407.27
  5. Step 5: Solve for x
    x = 76,987,407.27/12,129.09
  6. Step 6: Final answer
    x = 6,347.33

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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.