Home / 3,938.78-5,435.51-2,170.35

Finding the Fourth Proportional to 3,938.78, 5,435.51 and 2,170.35

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Solution

The fourth proportional to 3,938.78, 5,435.51 and 2,170.35 is: 2,995.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.78 : 5,435.51 = 2,170.35 : x
  2. Step 2: Convert to fraction form
    3,938.78/5,435.51 = 2,170.35/x
  3. Step 3: Cross multiply
    3,938.78x = 5,435.51 × 2,170.35
  4. Step 4: Simplify right side
    3,938.78x = 11,796,948.28
  5. Step 5: Solve for x
    x = 11,796,948.28/3,938.78
  6. Step 6: Final answer
    x = 2,995.07

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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.