Home / 20,823.36-28,736.93-11,391.92

Finding the Fourth Proportional to 20,823.36, 28,736.93 and 11,391.92

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Solution

The fourth proportional to 20,823.36, 28,736.93 and 11,391.92 is: 15,721.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.36 : 28,736.93 = 11,391.92 : x
  2. Step 2: Convert to fraction form
    20,823.36/28,736.93 = 11,391.92/x
  3. Step 3: Cross multiply
    20,823.36x = 28,736.93 × 11,391.92
  4. Step 4: Simplify right side
    20,823.36x = 327,368,865.21
  5. Step 5: Solve for x
    x = 327,368,865.21/20,823.36
  6. Step 6: Final answer
    x = 15,721.23

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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.