Home / 21,136.32-29,172.24-12,183.48

Finding the Fourth Proportional to 21,136.32, 29,172.24 and 12,183.48

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Solution

The fourth proportional to 21,136.32, 29,172.24 and 12,183.48 is: 16,815.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.32 : 29,172.24 = 12,183.48 : x
  2. Step 2: Convert to fraction form
    21,136.32/29,172.24 = 12,183.48/x
  3. Step 3: Cross multiply
    21,136.32x = 29,172.24 × 12,183.48
  4. Step 4: Simplify right side
    21,136.32x = 355,419,402.60
  5. Step 5: Solve for x
    x = 355,419,402.60/21,136.32
  6. Step 6: Final answer
    x = 16,815.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.