Home / 20,619.93-28,453.77-12,122.33

Finding the Fourth Proportional to 20,619.93, 28,453.77 and 12,122.33

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Solution

The fourth proportional to 20,619.93, 28,453.77 and 12,122.33 is: 16,727.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,619.93 : 28,453.77 = 12,122.33 : x
  2. Step 2: Convert to fraction form
    20,619.93/28,453.77 = 12,122.33/x
  3. Step 3: Cross multiply
    20,619.93x = 28,453.77 × 12,122.33
  4. Step 4: Simplify right side
    20,619.93x = 344,925,847.42
  5. Step 5: Solve for x
    x = 344,925,847.42/20,619.93
  6. Step 6: Final answer
    x = 16,727.79

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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.