Home / 3,924.38-5,415.65-2,155.97

Finding the Fourth Proportional to 3,924.38, 5,415.65 and 2,155.97

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Solution

The fourth proportional to 3,924.38, 5,415.65 and 2,155.97 is: 2,975.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,924.38 : 5,415.65 = 2,155.97 : x
  2. Step 2: Convert to fraction form
    3,924.38/5,415.65 = 2,155.97/x
  3. Step 3: Cross multiply
    3,924.38x = 5,415.65 × 2,155.97
  4. Step 4: Simplify right side
    3,924.38x = 11,675,941.07
  5. Step 5: Solve for x
    x = 11,675,941.07/3,924.38
  6. Step 6: Final answer
    x = 2,975.24

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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.