Home / 13,687.06-20,530.59-7,839.58

Finding the Fourth Proportional to 13,687.06, 20,530.59 and 7,839.58

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Solution

The fourth proportional to 13,687.06, 20,530.59 and 7,839.58 is: 11,759.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.06 : 20,530.59 = 7,839.58 : x
  2. Step 2: Convert to fraction form
    13,687.06/20,530.59 = 7,839.58/x
  3. Step 3: Cross multiply
    13,687.06x = 20,530.59 × 7,839.58
  4. Step 4: Simplify right side
    13,687.06x = 160,951,202.75
  5. Step 5: Solve for x
    x = 160,951,202.75/13,687.06
  6. Step 6: Final answer
    x = 11,759.37

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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.