Home / 20,845.06-28,755.42-14,128.39

Finding the Fourth Proportional to 20,845.06, 28,755.42 and 14,128.39

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Solution

The fourth proportional to 20,845.06, 28,755.42 and 14,128.39 is: 19,489.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,845.06 : 28,755.42 = 14,128.39 : x
  2. Step 2: Convert to fraction form
    20,845.06/28,755.42 = 14,128.39/x
  3. Step 3: Cross multiply
    20,845.06x = 28,755.42 × 14,128.39
  4. Step 4: Simplify right side
    20,845.06x = 406,267,788.37
  5. Step 5: Solve for x
    x = 406,267,788.37/20,845.06
  6. Step 6: Final answer
    x = 19,489.88

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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.