Home / 20,992.85-28,968.82-11,561.41

Finding the Fourth Proportional to 20,992.85, 28,968.82 and 11,561.41

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Solution

The fourth proportional to 20,992.85, 28,968.82 and 11,561.41 is: 15,954.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.85 : 28,968.82 = 11,561.41 : x
  2. Step 2: Convert to fraction form
    20,992.85/28,968.82 = 11,561.41/x
  3. Step 3: Cross multiply
    20,992.85x = 28,968.82 × 11,561.41
  4. Step 4: Simplify right side
    20,992.85x = 334,920,477.66
  5. Step 5: Solve for x
    x = 334,920,477.66/20,992.85
  6. Step 6: Final answer
    x = 15,954.03

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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.