Home / 13,759.71-20,625.56-5,428.29

Finding the Fourth Proportional to 13,759.71, 20,625.56 and 5,428.29

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Solution

The fourth proportional to 13,759.71, 20,625.56 and 5,428.29 is: 8,136.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,759.71 : 20,625.56 = 5,428.29 : x
  2. Step 2: Convert to fraction form
    13,759.71/20,625.56 = 5,428.29/x
  3. Step 3: Cross multiply
    13,759.71x = 20,625.56 × 5,428.29
  4. Step 4: Simplify right side
    13,759.71x = 111,961,493.95
  5. Step 5: Solve for x
    x = 111,961,493.95/13,759.71
  6. Step 6: Final answer
    x = 8,136.91

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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.