Home / 3,938.72-5,435.45-2,170.29

Finding the Fourth Proportional to 3,938.72, 5,435.45 and 2,170.29

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Solution

The fourth proportional to 3,938.72, 5,435.45 and 2,170.29 is: 2,995.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.72 : 5,435.45 = 2,170.29 : x
  2. Step 2: Convert to fraction form
    3,938.72/5,435.45 = 2,170.29/x
  3. Step 3: Cross multiply
    3,938.72x = 5,435.45 × 2,170.29
  4. Step 4: Simplify right side
    3,938.72x = 11,796,479.68
  5. Step 5: Solve for x
    x = 11,796,479.68/3,938.72
  6. Step 6: Final answer
    x = 2,995.00

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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.