Home / 3,888.62-5,366.37-2,120.30

Finding the Fourth Proportional to 3,888.62, 5,366.37 and 2,120.30

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Solution

The fourth proportional to 3,888.62, 5,366.37 and 2,120.30 is: 2,926.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.62 : 5,366.37 = 2,120.30 : x
  2. Step 2: Convert to fraction form
    3,888.62/5,366.37 = 2,120.30/x
  3. Step 3: Cross multiply
    3,888.62x = 5,366.37 × 2,120.30
  4. Step 4: Simplify right side
    3,888.62x = 11,378,314.31
  5. Step 5: Solve for x
    x = 11,378,314.31/3,888.62
  6. Step 6: Final answer
    x = 2,926.05

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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.