Home / 3,918.48-5,405.04-2,739.12

Finding the Fourth Proportional to 3,918.48, 5,405.04 and 2,739.12

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Solution

The fourth proportional to 3,918.48, 5,405.04 and 2,739.12 is: 3,778.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,918.48 : 5,405.04 = 2,739.12 : x
  2. Step 2: Convert to fraction form
    3,918.48/5,405.04 = 2,739.12/x
  3. Step 3: Cross multiply
    3,918.48x = 5,405.04 × 2,739.12
  4. Step 4: Simplify right side
    3,918.48x = 14,805,053.16
  5. Step 5: Solve for x
    x = 14,805,053.16/3,918.48
  6. Step 6: Final answer
    x = 3,778.26

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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.