Home / 20,992.52-28,969.74-11,561.96

Finding the Fourth Proportional to 20,992.52, 28,969.74 and 11,561.96

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Solution

The fourth proportional to 20,992.52, 28,969.74 and 11,561.96 is: 15,955.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,992.52 : 28,969.74 = 11,561.96 : x
  2. Step 2: Convert to fraction form
    20,992.52/28,969.74 = 11,561.96/x
  3. Step 3: Cross multiply
    20,992.52x = 28,969.74 × 11,561.96
  4. Step 4: Simplify right side
    20,992.52x = 334,946,975.09
  5. Step 5: Solve for x
    x = 334,946,975.09/20,992.52
  6. Step 6: Final answer
    x = 15,955.54

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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.