Home / 13,759.09-20,639.52-3,899.15

Finding the Fourth Proportional to 13,759.09, 20,639.52 and 3,899.15

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Solution

The fourth proportional to 13,759.09, 20,639.52 and 3,899.15 is: 5,848.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.09 : 20,639.52 = 3,899.15 : x
  2. Step 2: Convert to fraction form
    13,759.09/20,639.52 = 3,899.15/x
  3. Step 3: Cross multiply
    13,759.09x = 20,639.52 × 3,899.15
  4. Step 4: Simplify right side
    13,759.09x = 80,476,584.41
  5. Step 5: Solve for x
    x = 80,476,584.41/13,759.09
  6. Step 6: Final answer
    x = 5,848.98

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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.