Home / 12,145.85-18,218.84-3,380.77

Finding the Fourth Proportional to 12,145.85, 18,218.84 and 3,380.77

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Solution

The fourth proportional to 12,145.85, 18,218.84 and 3,380.77 is: 5,071.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,145.85 : 18,218.84 = 3,380.77 : x
  2. Step 2: Convert to fraction form
    12,145.85/18,218.84 = 3,380.77/x
  3. Step 3: Cross multiply
    12,145.85x = 18,218.84 × 3,380.77
  4. Step 4: Simplify right side
    12,145.85x = 61,593,732.59
  5. Step 5: Solve for x
    x = 61,593,732.59/12,145.85
  6. Step 6: Final answer
    x = 5,071.18

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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.