Home / 20,823.14-28,735.96-11,391.72

Finding the Fourth Proportional to 20,823.14, 28,735.96 and 11,391.72

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Solution

The fourth proportional to 20,823.14, 28,735.96 and 11,391.72 is: 15,720.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.14 : 28,735.96 = 11,391.72 : x
  2. Step 2: Convert to fraction form
    20,823.14/28,735.96 = 11,391.72/x
  3. Step 3: Cross multiply
    20,823.14x = 28,735.96 × 11,391.72
  4. Step 4: Simplify right side
    20,823.14x = 327,352,010.25
  5. Step 5: Solve for x
    x = 327,352,010.25/20,823.14
  6. Step 6: Final answer
    x = 15,720.59

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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.