Home / 20,741.76-28,638.36-12,786.48

Finding the Fourth Proportional to 20,741.76, 28,638.36 and 12,786.48

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Solution

The fourth proportional to 20,741.76, 28,638.36 and 12,786.48 is: 17,654.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,741.76 : 28,638.36 = 12,786.48 : x
  2. Step 2: Convert to fraction form
    20,741.76/28,638.36 = 12,786.48/x
  3. Step 3: Cross multiply
    20,741.76x = 28,638.36 × 12,786.48
  4. Step 4: Simplify right side
    20,741.76x = 366,183,817.37
  5. Step 5: Solve for x
    x = 366,183,817.37/20,741.76
  6. Step 6: Final answer
    x = 17,654.42

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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.