Home / 3,115.45-4,667.10-2,131.30

Finding the Fourth Proportional to 3,115.45, 4,667.10 and 2,131.30

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Solution

The fourth proportional to 3,115.45, 4,667.10 and 2,131.30 is: 3,192.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,115.45 : 4,667.10 = 2,131.30 : x
  2. Step 2: Convert to fraction form
    3,115.45/4,667.10 = 2,131.30/x
  3. Step 3: Cross multiply
    3,115.45x = 4,667.10 × 2,131.30
  4. Step 4: Simplify right side
    3,115.45x = 9,946,990.23
  5. Step 5: Solve for x
    x = 9,946,990.23/3,115.45
  6. Step 6: Final answer
    x = 3,192.79

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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.