Home / 20,940.12-28,902.24-11,992.68

Finding the Fourth Proportional to 20,940.12, 28,902.24 and 11,992.68

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Solution

The fourth proportional to 20,940.12, 28,902.24 and 11,992.68 is: 16,552.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,940.12 : 28,902.24 = 11,992.68 : x
  2. Step 2: Convert to fraction form
    20,940.12/28,902.24 = 11,992.68/x
  3. Step 3: Cross multiply
    20,940.12x = 28,902.24 × 11,992.68
  4. Step 4: Simplify right side
    20,940.12x = 346,615,315.60
  5. Step 5: Solve for x
    x = 346,615,315.60/20,940.12
  6. Step 6: Final answer
    x = 16,552.69

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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.