Home / 12,640.05-18,945.64-7,698.75

Finding the Fourth Proportional to 12,640.05, 18,945.64 and 7,698.75

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Solution

The fourth proportional to 12,640.05, 18,945.64 and 7,698.75 is: 11,539.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,640.05 : 18,945.64 = 7,698.75 : x
  2. Step 2: Convert to fraction form
    12,640.05/18,945.64 = 7,698.75/x
  3. Step 3: Cross multiply
    12,640.05x = 18,945.64 × 7,698.75
  4. Step 4: Simplify right side
    12,640.05x = 145,857,745.95
  5. Step 5: Solve for x
    x = 145,857,745.95/12,640.05
  6. Step 6: Final answer
    x = 11,539.33

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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.