Home / 12,081.10-18,121.65-9,165.10

Finding the Fourth Proportional to 12,081.10, 18,121.65 and 9,165.10

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Solution

The fourth proportional to 12,081.10, 18,121.65 and 9,165.10 is: 13,747.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,081.10 : 18,121.65 = 9,165.10 : x
  2. Step 2: Convert to fraction form
    12,081.10/18,121.65 = 9,165.10/x
  3. Step 3: Cross multiply
    12,081.10x = 18,121.65 × 9,165.10
  4. Step 4: Simplify right side
    12,081.10x = 166,086,734.42
  5. Step 5: Solve for x
    x = 166,086,734.42/12,081.10
  6. Step 6: Final answer
    x = 13,747.65

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Similar ratio
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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.