Home / 20,639.24-28,481.27-11,687.23

Finding the Fourth Proportional to 20,639.24, 28,481.27 and 11,687.23

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Solution

The fourth proportional to 20,639.24, 28,481.27 and 11,687.23 is: 16,127.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.24 : 28,481.27 = 11,687.23 : x
  2. Step 2: Convert to fraction form
    20,639.24/28,481.27 = 11,687.23/x
  3. Step 3: Cross multiply
    20,639.24x = 28,481.27 × 11,687.23
  4. Step 4: Simplify right side
    20,639.24x = 332,867,111.20
  5. Step 5: Solve for x
    x = 332,867,111.20/20,639.24
  6. Step 6: Final answer
    x = 16,127.88

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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.