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Finding the Fourth Proportional to 21,183.57, 29,230.20 and 11,752.20

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Solution

The fourth proportional to 21,183.57, 29,230.20 and 11,752.20 is: 16,216.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,183.57 : 29,230.20 = 11,752.20 : x
  2. Step 2: Convert to fraction form
    21,183.57/29,230.20 = 11,752.20/x
  3. Step 3: Cross multiply
    21,183.57x = 29,230.20 × 11,752.20
  4. Step 4: Simplify right side
    21,183.57x = 343,519,156.44
  5. Step 5: Solve for x
    x = 343,519,156.44/21,183.57
  6. Step 6: Final answer
    x = 16,216.30

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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.