Home / 3,917.16-5,405.40-2,148.48

Finding the Fourth Proportional to 3,917.16, 5,405.40 and 2,148.48

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Solution

The fourth proportional to 3,917.16, 5,405.40 and 2,148.48 is: 2,964.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.16 : 5,405.40 = 2,148.48 : x
  2. Step 2: Convert to fraction form
    3,917.16/5,405.40 = 2,148.48/x
  3. Step 3: Cross multiply
    3,917.16x = 5,405.40 × 2,148.48
  4. Step 4: Simplify right side
    3,917.16x = 11,613,393.79
  5. Step 5: Solve for x
    x = 11,613,393.79/3,917.16
  6. Step 6: Final answer
    x = 2,964.75

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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.