Home / 12,145.16-18,217.73-3,380.75

Finding the Fourth Proportional to 12,145.16, 18,217.73 and 3,380.75

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Solution

The fourth proportional to 12,145.16, 18,217.73 and 3,380.75 is: 5,071.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.16 : 18,217.73 = 3,380.75 : x
  2. Step 2: Convert to fraction form
    12,145.16/18,217.73 = 3,380.75/x
  3. Step 3: Cross multiply
    12,145.16x = 18,217.73 × 3,380.75
  4. Step 4: Simplify right side
    12,145.16x = 61,589,644.69
  5. Step 5: Solve for x
    x = 61,589,644.69/12,145.16
  6. Step 6: Final answer
    x = 5,071.13

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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.