Home / 20,620.89-28,480.14-13,894.84

Finding the Fourth Proportional to 20,620.89, 28,480.14 and 13,894.84

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Solution

The fourth proportional to 20,620.89, 28,480.14 and 13,894.84 is: 19,190.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,620.89 : 28,480.14 = 13,894.84 : x
  2. Step 2: Convert to fraction form
    20,620.89/28,480.14 = 13,894.84/x
  3. Step 3: Cross multiply
    20,620.89x = 28,480.14 × 13,894.84
  4. Step 4: Simplify right side
    20,620.89x = 395,726,776.60
  5. Step 5: Solve for x
    x = 395,726,776.60/20,620.89
  6. Step 6: Final answer
    x = 19,190.58

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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.