Home / 3,953.80-5,456.14-2,185.30

Finding the Fourth Proportional to 3,953.80, 5,456.14 and 2,185.30

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Solution

The fourth proportional to 3,953.80, 5,456.14 and 2,185.30 is: 3,015.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,953.80 : 5,456.14 = 2,185.30 : x
  2. Step 2: Convert to fraction form
    3,953.80/5,456.14 = 2,185.30/x
  3. Step 3: Cross multiply
    3,953.80x = 5,456.14 × 2,185.30
  4. Step 4: Simplify right side
    3,953.80x = 11,923,302.74
  5. Step 5: Solve for x
    x = 11,923,302.74/3,953.80
  6. Step 6: Final answer
    x = 3,015.66

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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.