Home / 3,888.96-5,366.78-2,120.59

Finding the Fourth Proportional to 3,888.96, 5,366.78 and 2,120.59

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Solution

The fourth proportional to 3,888.96, 5,366.78 and 2,120.59 is: 2,926.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.96 : 5,366.78 = 2,120.59 : x
  2. Step 2: Convert to fraction form
    3,888.96/5,366.78 = 2,120.59/x
  3. Step 3: Cross multiply
    3,888.96x = 5,366.78 × 2,120.59
  4. Step 4: Simplify right side
    3,888.96x = 11,380,740.00
  5. Step 5: Solve for x
    x = 11,380,740.00/3,888.96
  6. Step 6: Final answer
    x = 2,926.43

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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.