Home / 21,147.21-29,191.39-12,202.38

Finding the Fourth Proportional to 21,147.21, 29,191.39 and 12,202.38

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Solution

The fourth proportional to 21,147.21, 29,191.39 and 12,202.38 is: 16,844.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.21 : 29,191.39 = 12,202.38 : x
  2. Step 2: Convert to fraction form
    21,147.21/29,191.39 = 12,202.38/x
  3. Step 3: Cross multiply
    21,147.21x = 29,191.39 × 12,202.38
  4. Step 4: Simplify right side
    21,147.21x = 356,204,403.00
  5. Step 5: Solve for x
    x = 356,204,403.00/21,147.21
  6. Step 6: Final answer
    x = 16,844.04

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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.