Home / 3,938.99-5,435.75-2,170.62

Finding the Fourth Proportional to 3,938.99, 5,435.75 and 2,170.62

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Solution

The fourth proportional to 3,938.99, 5,435.75 and 2,170.62 is: 2,995.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.99 : 5,435.75 = 2,170.62 : x
  2. Step 2: Convert to fraction form
    3,938.99/5,435.75 = 2,170.62/x
  3. Step 3: Cross multiply
    3,938.99x = 5,435.75 × 2,170.62
  4. Step 4: Simplify right side
    3,938.99x = 11,798,936.81
  5. Step 5: Solve for x
    x = 11,798,936.81/3,938.99
  6. Step 6: Final answer
    x = 2,995.43

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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.