Home / 20,540.83-28,346.31-11,109.39

Finding the Fourth Proportional to 20,540.83, 28,346.31 and 11,109.39

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Solution

The fourth proportional to 20,540.83, 28,346.31 and 11,109.39 is: 15,330.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,540.83 : 28,346.31 = 11,109.39 : x
  2. Step 2: Convert to fraction form
    20,540.83/28,346.31 = 11,109.39/x
  3. Step 3: Cross multiply
    20,540.83x = 28,346.31 × 11,109.39
  4. Step 4: Simplify right side
    20,540.83x = 314,910,212.85
  5. Step 5: Solve for x
    x = 314,910,212.85/20,540.83
  6. Step 6: Final answer
    x = 15,330.94

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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.