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Finding the Fourth Proportional to 18,205.21, 25,118.12 and 11,742.12

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Solution

The fourth proportional to 18,205.21, 25,118.12 and 11,742.12 is: 16,200.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,205.21 : 25,118.12 = 11,742.12 : x
  2. Step 2: Convert to fraction form
    18,205.21/25,118.12 = 11,742.12/x
  3. Step 3: Cross multiply
    18,205.21x = 25,118.12 × 11,742.12
  4. Step 4: Simplify right side
    18,205.21x = 294,939,794.91
  5. Step 5: Solve for x
    x = 294,939,794.91/18,205.21
  6. Step 6: Final answer
    x = 16,200.85

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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.