Home / 3,138.06-4,705.20-1,836.78

Finding the Fourth Proportional to 3,138.06, 4,705.20 and 1,836.78

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Solution

The fourth proportional to 3,138.06, 4,705.20 and 1,836.78 is: 2,754.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.06 : 4,705.20 = 1,836.78 : x
  2. Step 2: Convert to fraction form
    3,138.06/4,705.20 = 1,836.78/x
  3. Step 3: Cross multiply
    3,138.06x = 4,705.20 × 1,836.78
  4. Step 4: Simplify right side
    3,138.06x = 8,642,417.26
  5. Step 5: Solve for x
    x = 8,642,417.26/3,138.06
  6. Step 6: Final answer
    x = 2,754.06

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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.