Home / 3,102.12-4,653.30-2,125.80

Finding the Fourth Proportional to 3,102.12, 4,653.30 and 2,125.80

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Solution

The fourth proportional to 3,102.12, 4,653.30 and 2,125.80 is: 3,188.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,102.12 : 4,653.30 = 2,125.80 : x
  2. Step 2: Convert to fraction form
    3,102.12/4,653.30 = 2,125.80/x
  3. Step 3: Cross multiply
    3,102.12x = 4,653.30 × 2,125.80
  4. Step 4: Simplify right side
    3,102.12x = 9,891,985.14
  5. Step 5: Solve for x
    x = 9,891,985.14/3,102.12
  6. Step 6: Final answer
    x = 3,188.78

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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.