Home / 20,198.18-27,872.10-12,644.19

Finding the Fourth Proportional to 20,198.18, 27,872.10 and 12,644.19

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Solution

The fourth proportional to 20,198.18, 27,872.10 and 12,644.19 is: 17,448.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,198.18 : 27,872.10 = 12,644.19 : x
  2. Step 2: Convert to fraction form
    20,198.18/27,872.10 = 12,644.19/x
  3. Step 3: Cross multiply
    20,198.18x = 27,872.10 × 12,644.19
  4. Step 4: Simplify right side
    20,198.18x = 352,420,128.10
  5. Step 5: Solve for x
    x = 352,420,128.10/20,198.18
  6. Step 6: Final answer
    x = 17,448.11

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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.