Home / 13,581.68-18,745.05-7,919.75

Finding the Fourth Proportional to 13,581.68, 18,745.05 and 7,919.75

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Solution

The fourth proportional to 13,581.68, 18,745.05 and 7,919.75 is: 10,930.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,581.68 : 18,745.05 = 7,919.75 : x
  2. Step 2: Convert to fraction form
    13,581.68/18,745.05 = 7,919.75/x
  3. Step 3: Cross multiply
    13,581.68x = 18,745.05 × 7,919.75
  4. Step 4: Simplify right side
    13,581.68x = 148,456,109.74
  5. Step 5: Solve for x
    x = 148,456,109.74/13,581.68
  6. Step 6: Final answer
    x = 10,930.61

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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.