Home / 20,819.97-28,733.58-11,389.95

Finding the Fourth Proportional to 20,819.97, 28,733.58 and 11,389.95

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Solution

The fourth proportional to 20,819.97, 28,733.58 and 11,389.95 is: 15,719.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.97 : 28,733.58 = 11,389.95 : x
  2. Step 2: Convert to fraction form
    20,819.97/28,733.58 = 11,389.95/x
  3. Step 3: Cross multiply
    20,819.97x = 28,733.58 × 11,389.95
  4. Step 4: Simplify right side
    20,819.97x = 327,274,039.52
  5. Step 5: Solve for x
    x = 327,274,039.52/20,819.97
  6. Step 6: Final answer
    x = 15,719.24

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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.