Home / 2,728.81-3,761.77-2,169.50

Finding the Fourth Proportional to 2,728.81, 3,761.77 and 2,169.50

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Solution

The fourth proportional to 2,728.81, 3,761.77 and 2,169.50 is: 2,990.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,728.81 : 3,761.77 = 2,169.50 : x
  2. Step 2: Convert to fraction form
    2,728.81/3,761.77 = 2,169.50/x
  3. Step 3: Cross multiply
    2,728.81x = 3,761.77 × 2,169.50
  4. Step 4: Simplify right side
    2,728.81x = 8,161,160.02
  5. Step 5: Solve for x
    x = 8,161,160.02/2,728.81
  6. Step 6: Final answer
    x = 2,990.75

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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.