Home / 3,951.90-5,453.48-2,159.38

Finding the Fourth Proportional to 3,951.90, 5,453.48 and 2,159.38

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Solution

The fourth proportional to 3,951.90, 5,453.48 and 2,159.38 is: 2,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,951.90 : 5,453.48 = 2,159.38 : x
  2. Step 2: Convert to fraction form
    3,951.90/5,453.48 = 2,159.38/x
  3. Step 3: Cross multiply
    3,951.90x = 5,453.48 × 2,159.38
  4. Step 4: Simplify right side
    3,951.90x = 11,776,135.64
  5. Step 5: Solve for x
    x = 11,776,135.64/3,951.90
  6. Step 6: Final answer
    x = 2,979.87

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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.