Home / 2,764.80-3,811.84-1,937.92

Finding the Fourth Proportional to 2,764.80, 3,811.84 and 1,937.92

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Solution

The fourth proportional to 2,764.80, 3,811.84 and 1,937.92 is: 2,671.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,764.80 : 3,811.84 = 1,937.92 : x
  2. Step 2: Convert to fraction form
    2,764.80/3,811.84 = 1,937.92/x
  3. Step 3: Cross multiply
    2,764.80x = 3,811.84 × 1,937.92
  4. Step 4: Simplify right side
    2,764.80x = 7,387,040.97
  5. Step 5: Solve for x
    x = 7,387,040.97/2,764.80
  6. Step 6: Final answer
    x = 2,671.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.