Home / 20,479.09-30,679.23-12,558.48

Finding the Fourth Proportional to 20,479.09, 30,679.23 and 12,558.48

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Solution

The fourth proportional to 20,479.09, 30,679.23 and 12,558.48 is: 18,813.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.09 : 30,679.23 = 12,558.48 : x
  2. Step 2: Convert to fraction form
    20,479.09/30,679.23 = 12,558.48/x
  3. Step 3: Cross multiply
    20,479.09x = 30,679.23 × 12,558.48
  4. Step 4: Simplify right side
    20,479.09x = 385,284,496.37
  5. Step 5: Solve for x
    x = 385,284,496.37/20,479.09
  6. Step 6: Final answer
    x = 18,813.56

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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.