Home / 20,451.26-28,236.75-15,662.75

Finding the Fourth Proportional to 20,451.26, 28,236.75 and 15,662.75

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Solution

The fourth proportional to 20,451.26, 28,236.75 and 15,662.75 is: 21,625.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,451.26 : 28,236.75 = 15,662.75 : x
  2. Step 2: Convert to fraction form
    20,451.26/28,236.75 = 15,662.75/x
  3. Step 3: Cross multiply
    20,451.26x = 28,236.75 × 15,662.75
  4. Step 4: Simplify right side
    20,451.26x = 442,265,156.06
  5. Step 5: Solve for x
    x = 442,265,156.06/20,451.26
  6. Step 6: Final answer
    x = 21,625.33

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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.