Home / 20,621.05-28,456.99-11,669.27

Finding the Fourth Proportional to 20,621.05, 28,456.99 and 11,669.27

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Solution

The fourth proportional to 20,621.05, 28,456.99 and 11,669.27 is: 16,103.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.05 : 28,456.99 = 11,669.27 : x
  2. Step 2: Convert to fraction form
    20,621.05/28,456.99 = 11,669.27/x
  3. Step 3: Cross multiply
    20,621.05x = 28,456.99 × 11,669.27
  4. Step 4: Simplify right side
    20,621.05x = 332,072,128.24
  5. Step 5: Solve for x
    x = 332,072,128.24/20,621.05
  6. Step 6: Final answer
    x = 16,103.55

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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.