Home / 12,121.25-16,727.60-7,408.13

Finding the Fourth Proportional to 12,121.25, 16,727.60 and 7,408.13

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Solution

The fourth proportional to 12,121.25, 16,727.60 and 7,408.13 is: 10,223.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,121.25 : 16,727.60 = 7,408.13 : x
  2. Step 2: Convert to fraction form
    12,121.25/16,727.60 = 7,408.13/x
  3. Step 3: Cross multiply
    12,121.25x = 16,727.60 × 7,408.13
  4. Step 4: Simplify right side
    12,121.25x = 123,920,198.35
  5. Step 5: Solve for x
    x = 123,920,198.35/12,121.25
  6. Step 6: Final answer
    x = 10,223.38

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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.