Home / 12,081.15-18,119.30-7,692.57

Finding the Fourth Proportional to 12,081.15, 18,119.30 and 7,692.57

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Solution

The fourth proportional to 12,081.15, 18,119.30 and 7,692.57 is: 11,537.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.15 : 18,119.30 = 7,692.57 : x
  2. Step 2: Convert to fraction form
    12,081.15/18,119.30 = 7,692.57/x
  3. Step 3: Cross multiply
    12,081.15x = 18,119.30 × 7,692.57
  4. Step 4: Simplify right side
    12,081.15x = 139,383,945.14
  5. Step 5: Solve for x
    x = 139,383,945.14/12,081.15
  6. Step 6: Final answer
    x = 11,537.31

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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.