Home / 13,640.45-20,439.77-9,181.62

Finding the Fourth Proportional to 13,640.45, 20,439.77 and 9,181.62

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Solution

The fourth proportional to 13,640.45, 20,439.77 and 9,181.62 is: 13,758.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.45 : 20,439.77 = 9,181.62 : x
  2. Step 2: Convert to fraction form
    13,640.45/20,439.77 = 9,181.62/x
  3. Step 3: Cross multiply
    13,640.45x = 20,439.77 × 9,181.62
  4. Step 4: Simplify right side
    13,640.45x = 187,670,223.98
  5. Step 5: Solve for x
    x = 187,670,223.98/13,640.45
  6. Step 6: Final answer
    x = 13,758.37

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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.