Home / 3,888.89-5,366.46-2,120.46

Finding the Fourth Proportional to 3,888.89, 5,366.46 and 2,120.46

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Solution

The fourth proportional to 3,888.89, 5,366.46 and 2,120.46 is: 2,926.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,888.89 : 5,366.46 = 2,120.46 : x
  2. Step 2: Convert to fraction form
    3,888.89/5,366.46 = 2,120.46/x
  3. Step 3: Cross multiply
    3,888.89x = 5,366.46 × 2,120.46
  4. Step 4: Simplify right side
    3,888.89x = 11,379,351.60
  5. Step 5: Solve for x
    x = 11,379,351.60/3,888.89
  6. Step 6: Final answer
    x = 2,926.12

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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.