Home / 12,103.80-18,131.40-8,167.20

Finding the Fourth Proportional to 12,103.80, 18,131.40 and 8,167.20

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Solution

The fourth proportional to 12,103.80, 18,131.40 and 8,167.20 is: 12,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,103.80 : 18,131.40 = 8,167.20 : x
  2. Step 2: Convert to fraction form
    12,103.80/18,131.40 = 8,167.20/x
  3. Step 3: Cross multiply
    12,103.80x = 18,131.40 × 8,167.20
  4. Step 4: Simplify right side
    12,103.80x = 148,082,770.08
  5. Step 5: Solve for x
    x = 148,082,770.08/12,103.80
  6. Step 6: Final answer
    x = 12,234.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.