Home / 20,782.24-28,690.20-12,286.96

Finding the Fourth Proportional to 20,782.24, 28,690.20 and 12,286.96

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Solution

The fourth proportional to 20,782.24, 28,690.20 and 12,286.96 is: 16,962.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.24 : 28,690.20 = 12,286.96 : x
  2. Step 2: Convert to fraction form
    20,782.24/28,690.20 = 12,286.96/x
  3. Step 3: Cross multiply
    20,782.24x = 28,690.20 × 12,286.96
  4. Step 4: Simplify right side
    20,782.24x = 352,515,268.07
  5. Step 5: Solve for x
    x = 352,515,268.07/20,782.24
  6. Step 6: Final answer
    x = 16,962.33

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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.