Home / 20,782.58-28,676.12-12,286.08

Finding the Fourth Proportional to 20,782.58, 28,676.12 and 12,286.08

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Solution

The fourth proportional to 20,782.58, 28,676.12 and 12,286.08 is: 16,952.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,782.58 : 28,676.12 = 12,286.08 : x
  2. Step 2: Convert to fraction form
    20,782.58/28,676.12 = 12,286.08/x
  3. Step 3: Cross multiply
    20,782.58x = 28,676.12 × 12,286.08
  4. Step 4: Simplify right side
    20,782.58x = 352,317,042.98
  5. Step 5: Solve for x
    x = 352,317,042.98/20,782.58
  6. Step 6: Final answer
    x = 16,952.52

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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.