Home / 20,971.69-28,942.31-11,540.86

Finding the Fourth Proportional to 20,971.69, 28,942.31 and 11,540.86

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Solution

The fourth proportional to 20,971.69, 28,942.31 and 11,540.86 is: 15,927.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.69 : 28,942.31 = 11,540.86 : x
  2. Step 2: Convert to fraction form
    20,971.69/28,942.31 = 11,540.86/x
  3. Step 3: Cross multiply
    20,971.69x = 28,942.31 × 11,540.86
  4. Step 4: Simplify right side
    20,971.69x = 334,019,147.79
  5. Step 5: Solve for x
    x = 334,019,147.79/20,971.69
  6. Step 6: Final answer
    x = 15,927.15

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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.