Home / 8,145.38-12,212.46-3,215.58

Finding the Fourth Proportional to 8,145.38, 12,212.46 and 3,215.58

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Solution

The fourth proportional to 8,145.38, 12,212.46 and 3,215.58 is: 4,821.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.38 : 12,212.46 = 3,215.58 : x
  2. Step 2: Convert to fraction form
    8,145.38/12,212.46 = 3,215.58/x
  3. Step 3: Cross multiply
    8,145.38x = 12,212.46 × 3,215.58
  4. Step 4: Simplify right side
    8,145.38x = 39,270,142.13
  5. Step 5: Solve for x
    x = 39,270,142.13/8,145.38
  6. Step 6: Final answer
    x = 4,821.16

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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.