Home / 20,823.19-28,736.42-11,391.95

Finding the Fourth Proportional to 20,823.19, 28,736.42 and 11,391.95

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Solution

The fourth proportional to 20,823.19, 28,736.42 and 11,391.95 is: 15,721.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,823.19 : 28,736.42 = 11,391.95 : x
  2. Step 2: Convert to fraction form
    20,823.19/28,736.42 = 11,391.95/x
  3. Step 3: Cross multiply
    20,823.19x = 28,736.42 × 11,391.95
  4. Step 4: Simplify right side
    20,823.19x = 327,363,874.70
  5. Step 5: Solve for x
    x = 327,363,874.70/20,823.19
  6. Step 6: Final answer
    x = 15,721.12

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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.