Home / 13,758.12-20,640.83-8,427.38

Finding the Fourth Proportional to 13,758.12, 20,640.83 and 8,427.38

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Solution

The fourth proportional to 13,758.12, 20,640.83 and 8,427.38 is: 12,643.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,758.12 : 20,640.83 = 8,427.38 : x
  2. Step 2: Convert to fraction form
    13,758.12/20,640.83 = 8,427.38/x
  3. Step 3: Cross multiply
    13,758.12x = 20,640.83 × 8,427.38
  4. Step 4: Simplify right side
    13,758.12x = 173,947,972.58
  5. Step 5: Solve for x
    x = 173,947,972.58/13,758.12
  6. Step 6: Final answer
    x = 12,643.30

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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.