Home / 20,772.96-28,669.20-11,822.64

Finding the Fourth Proportional to 20,772.96, 28,669.20 and 11,822.64

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Solution

The fourth proportional to 20,772.96, 28,669.20 and 11,822.64 is: 16,316.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,772.96 : 28,669.20 = 11,822.64 : x
  2. Step 2: Convert to fraction form
    20,772.96/28,669.20 = 11,822.64/x
  3. Step 3: Cross multiply
    20,772.96x = 28,669.20 × 11,822.64
  4. Step 4: Simplify right side
    20,772.96x = 338,945,630.69
  5. Step 5: Solve for x
    x = 338,945,630.69/20,772.96
  6. Step 6: Final answer
    x = 16,316.67

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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.