Home / 3,940.32-5,437.57-2,147.81

Finding the Fourth Proportional to 3,940.32, 5,437.57 and 2,147.81

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Solution

The fourth proportional to 3,940.32, 5,437.57 and 2,147.81 is: 2,963.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.32 : 5,437.57 = 2,147.81 : x
  2. Step 2: Convert to fraction form
    3,940.32/5,437.57 = 2,147.81/x
  3. Step 3: Cross multiply
    3,940.32x = 5,437.57 × 2,147.81
  4. Step 4: Simplify right side
    3,940.32x = 11,678,867.22
  5. Step 5: Solve for x
    x = 11,678,867.22/3,940.32
  6. Step 6: Final answer
    x = 2,963.94

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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.