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Finding the Fourth Proportional to 13,103.99, 18,101.88 and 11,687.22

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Solution

The fourth proportional to 13,103.99, 18,101.88 and 11,687.22 is: 16,144.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,103.99 : 18,101.88 = 11,687.22 : x
  2. Step 2: Convert to fraction form
    13,103.99/18,101.88 = 11,687.22/x
  3. Step 3: Cross multiply
    13,103.99x = 18,101.88 × 11,687.22
  4. Step 4: Simplify right side
    13,103.99x = 211,560,653.97
  5. Step 5: Solve for x
    x = 211,560,653.97/13,103.99
  6. Step 6: Final answer
    x = 16,144.76

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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.