Home / 20,823.25-28,736.06-11,391.82

Finding the Fourth Proportional to 20,823.25, 28,736.06 and 11,391.82

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Solution

The fourth proportional to 20,823.25, 28,736.06 and 11,391.82 is: 15,720.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.25 : 28,736.06 = 11,391.82 : x
  2. Step 2: Convert to fraction form
    20,823.25/28,736.06 = 11,391.82/x
  3. Step 3: Cross multiply
    20,823.25x = 28,736.06 × 11,391.82
  4. Step 4: Simplify right side
    20,823.25x = 327,355,865.11
  5. Step 5: Solve for x
    x = 327,355,865.11/20,823.25
  6. Step 6: Final answer
    x = 15,720.69

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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.