Home / 20,850.75-28,754.58-13,289.19

Finding the Fourth Proportional to 20,850.75, 28,754.58 and 13,289.19

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Solution

The fourth proportional to 20,850.75, 28,754.58 and 13,289.19 is: 18,326.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,850.75 : 28,754.58 = 13,289.19 : x
  2. Step 2: Convert to fraction form
    20,850.75/28,754.58 = 13,289.19/x
  3. Step 3: Cross multiply
    20,850.75x = 28,754.58 × 13,289.19
  4. Step 4: Simplify right side
    20,850.75x = 382,125,076.99
  5. Step 5: Solve for x
    x = 382,125,076.99/20,850.75
  6. Step 6: Final answer
    x = 18,326.68

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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.