Home / 20,661.58-28,512.42-11,708.86

Finding the Fourth Proportional to 20,661.58, 28,512.42 and 11,708.86

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Solution

The fourth proportional to 20,661.58, 28,512.42 and 11,708.86 is: 16,157.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.58 : 28,512.42 = 11,708.86 : x
  2. Step 2: Convert to fraction form
    20,661.58/28,512.42 = 11,708.86/x
  3. Step 3: Cross multiply
    20,661.58x = 28,512.42 × 11,708.86
  4. Step 4: Simplify right side
    20,661.58x = 333,847,934.04
  5. Step 5: Solve for x
    x = 333,847,934.04/20,661.58
  6. Step 6: Final answer
    x = 16,157.91

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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.