Home / 20,819.30-28,727.96-12,756.56

Finding the Fourth Proportional to 20,819.30, 28,727.96 and 12,756.56

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Solution

The fourth proportional to 20,819.30, 28,727.96 and 12,756.56 is: 17,602.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,819.30 : 28,727.96 = 12,756.56 : x
  2. Step 2: Convert to fraction form
    20,819.30/28,727.96 = 12,756.56/x
  3. Step 3: Cross multiply
    20,819.30x = 28,727.96 × 12,756.56
  4. Step 4: Simplify right side
    20,819.30x = 366,469,738.00
  5. Step 5: Solve for x
    x = 366,469,738.00/20,819.30
  6. Step 6: Final answer
    x = 17,602.41

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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.