Home / 13,839.56-20,759.22-3,978.80

Finding the Fourth Proportional to 13,839.56, 20,759.22 and 3,978.80

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Solution

The fourth proportional to 13,839.56, 20,759.22 and 3,978.80 is: 5,968.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,839.56 : 20,759.22 = 3,978.80 : x
  2. Step 2: Convert to fraction form
    13,839.56/20,759.22 = 3,978.80/x
  3. Step 3: Cross multiply
    13,839.56x = 20,759.22 × 3,978.80
  4. Step 4: Simplify right side
    13,839.56x = 82,596,784.54
  5. Step 5: Solve for x
    x = 82,596,784.54/13,839.56
  6. Step 6: Final answer
    x = 5,968.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.