Home / 21,135.30-29,165.94-12,183.18

Finding the Fourth Proportional to 21,135.30, 29,165.94 and 12,183.18

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Solution

The fourth proportional to 21,135.30, 29,165.94 and 12,183.18 is: 16,812.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,135.30 : 29,165.94 = 12,183.18 : x
  2. Step 2: Convert to fraction form
    21,135.30/29,165.94 = 12,183.18/x
  3. Step 3: Cross multiply
    21,135.30x = 29,165.94 × 12,183.18
  4. Step 4: Simplify right side
    21,135.30x = 355,333,896.89
  5. Step 5: Solve for x
    x = 355,333,896.89/21,135.30
  6. Step 6: Final answer
    x = 16,812.34

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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.