Home / 3,917.15-5,405.63-2,148.65

Finding the Fourth Proportional to 3,917.15, 5,405.63 and 2,148.65

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Solution

The fourth proportional to 3,917.15, 5,405.63 and 2,148.65 is: 2,965.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.15 : 5,405.63 = 2,148.65 : x
  2. Step 2: Convert to fraction form
    3,917.15/5,405.63 = 2,148.65/x
  3. Step 3: Cross multiply
    3,917.15x = 5,405.63 × 2,148.65
  4. Step 4: Simplify right side
    3,917.15x = 11,614,769.13
  5. Step 5: Solve for x
    x = 11,614,769.13/3,917.15
  6. Step 6: Final answer
    x = 2,965.11

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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.