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Finding the Fourth Proportional to 15,195.88, 20,982.18 and 11,653.48

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Solution

The fourth proportional to 15,195.88, 20,982.18 and 11,653.48 is: 16,090.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,195.88 : 20,982.18 = 11,653.48 : x
  2. Step 2: Convert to fraction form
    15,195.88/20,982.18 = 11,653.48/x
  3. Step 3: Cross multiply
    15,195.88x = 20,982.18 × 11,653.48
  4. Step 4: Simplify right side
    15,195.88x = 244,515,414.99
  5. Step 5: Solve for x
    x = 244,515,414.99/15,195.88
  6. Step 6: Final answer
    x = 16,090.90

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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.