Home / 20,680.29-28,536.48-12,181.86

Finding the Fourth Proportional to 20,680.29, 28,536.48 and 12,181.86

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Solution

The fourth proportional to 20,680.29, 28,536.48 and 12,181.86 is: 16,809.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,680.29 : 28,536.48 = 12,181.86 : x
  2. Step 2: Convert to fraction form
    20,680.29/28,536.48 = 12,181.86/x
  3. Step 3: Cross multiply
    20,680.29x = 28,536.48 × 12,181.86
  4. Step 4: Simplify right side
    20,680.29x = 347,627,249.60
  5. Step 5: Solve for x
    x = 347,627,249.60/20,680.29
  6. Step 6: Final answer
    x = 16,809.59

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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.