Home / 21,136.12-29,167.79-12,183.57

Finding the Fourth Proportional to 21,136.12, 29,167.79 and 12,183.57

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Solution

The fourth proportional to 21,136.12, 29,167.79 and 12,183.57 is: 16,813.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,136.12 : 29,167.79 = 12,183.57 : x
  2. Step 2: Convert to fraction form
    21,136.12/29,167.79 = 12,183.57/x
  3. Step 3: Cross multiply
    21,136.12x = 29,167.79 × 12,183.57
  4. Step 4: Simplify right side
    21,136.12x = 355,367,750.29
  5. Step 5: Solve for x
    x = 355,367,750.29/21,136.12
  6. Step 6: Final answer
    x = 16,813.29

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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.