Home / 12,145.92-18,218.90-3,380.83

Finding the Fourth Proportional to 12,145.92, 18,218.90 and 3,380.83

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Solution

The fourth proportional to 12,145.92, 18,218.90 and 3,380.83 is: 5,071.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.92 : 18,218.90 = 3,380.83 : x
  2. Step 2: Convert to fraction form
    12,145.92/18,218.90 = 3,380.83/x
  3. Step 3: Cross multiply
    12,145.92x = 18,218.90 × 3,380.83
  4. Step 4: Simplify right side
    12,145.92x = 61,595,003.69
  5. Step 5: Solve for x
    x = 61,595,003.69/12,145.92
  6. Step 6: Final answer
    x = 5,071.25

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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.