Home / 20,621.97-28,458.31-11,669.29

Finding the Fourth Proportional to 20,621.97, 28,458.31 and 11,669.29

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Solution

The fourth proportional to 20,621.97, 28,458.31 and 11,669.29 is: 16,103.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,621.97 : 28,458.31 = 11,669.29 : x
  2. Step 2: Convert to fraction form
    20,621.97/28,458.31 = 11,669.29/x
  3. Step 3: Cross multiply
    20,621.97x = 28,458.31 × 11,669.29
  4. Step 4: Simplify right side
    20,621.97x = 332,088,272.30
  5. Step 5: Solve for x
    x = 332,088,272.30/20,621.97
  6. Step 6: Final answer
    x = 16,103.62

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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.