Home / 20,115.32-30,327.31-18,760.12

Finding the Fourth Proportional to 20,115.32, 30,327.31 and 18,760.12

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Solution

The fourth proportional to 20,115.32, 30,327.31 and 18,760.12 is: 28,284.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,115.32 : 30,327.31 = 18,760.12 : x
  2. Step 2: Convert to fraction form
    20,115.32/30,327.31 = 18,760.12/x
  3. Step 3: Cross multiply
    20,115.32x = 30,327.31 × 18,760.12
  4. Step 4: Simplify right side
    20,115.32x = 568,943,974.88
  5. Step 5: Solve for x
    x = 568,943,974.88/20,115.32
  6. Step 6: Final answer
    x = 28,284.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.