Home / 20,486.42-30,716.91-8,634.09

Finding the Fourth Proportional to 20,486.42, 30,716.91 and 8,634.09

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Solution

The fourth proportional to 20,486.42, 30,716.91 and 8,634.09 is: 12,945.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,486.42 : 30,716.91 = 8,634.09 : x
  2. Step 2: Convert to fraction form
    20,486.42/30,716.91 = 8,634.09/x
  3. Step 3: Cross multiply
    20,486.42x = 30,716.91 × 8,634.09
  4. Step 4: Simplify right side
    20,486.42x = 265,212,565.46
  5. Step 5: Solve for x
    x = 265,212,565.46/20,486.42
  6. Step 6: Final answer
    x = 12,945.78

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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.