Home / 20,640.22-28,483.83-11,687.48

Finding the Fourth Proportional to 20,640.22, 28,483.83 and 11,687.48

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Solution

The fourth proportional to 20,640.22, 28,483.83 and 11,687.48 is: 16,128.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.22 : 28,483.83 = 11,687.48 : x
  2. Step 2: Convert to fraction form
    20,640.22/28,483.83 = 11,687.48/x
  3. Step 3: Cross multiply
    20,640.22x = 28,483.83 × 11,687.48
  4. Step 4: Simplify right side
    20,640.22x = 332,904,193.45
  5. Step 5: Solve for x
    x = 332,904,193.45/20,640.22
  6. Step 6: Final answer
    x = 16,128.91

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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.