Home / 20,115.52-30,145.68-15,181.12

Finding the Fourth Proportional to 20,115.52, 30,145.68 and 15,181.12

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Solution

The fourth proportional to 20,115.52, 30,145.68 and 15,181.12 is: 22,750.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.52 : 30,145.68 = 15,181.12 : x
  2. Step 2: Convert to fraction form
    20,115.52/30,145.68 = 15,181.12/x
  3. Step 3: Cross multiply
    20,115.52x = 30,145.68 × 15,181.12
  4. Step 4: Simplify right side
    20,115.52x = 457,645,185.56
  5. Step 5: Solve for x
    x = 457,645,185.56/20,115.52
  6. Step 6: Final answer
    x = 22,750.85

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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.