Home / 20,730.52-28,608.42-12,768.22

Finding the Fourth Proportional to 20,730.52, 28,608.42 and 12,768.22

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Solution

The fourth proportional to 20,730.52, 28,608.42 and 12,768.22 is: 17,620.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,730.52 : 28,608.42 = 12,768.22 : x
  2. Step 2: Convert to fraction form
    20,730.52/28,608.42 = 12,768.22/x
  3. Step 3: Cross multiply
    20,730.52x = 28,608.42 × 12,768.22
  4. Step 4: Simplify right side
    20,730.52x = 365,278,600.41
  5. Step 5: Solve for x
    x = 365,278,600.41/20,730.52
  6. Step 6: Final answer
    x = 17,620.33

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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.