Home / 3,938.65-5,435.31-2,146.12

Finding the Fourth Proportional to 3,938.65, 5,435.31 and 2,146.12

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Solution

The fourth proportional to 3,938.65, 5,435.31 and 2,146.12 is: 2,961.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,938.65 : 5,435.31 = 2,146.12 : x
  2. Step 2: Convert to fraction form
    3,938.65/5,435.31 = 2,146.12/x
  3. Step 3: Cross multiply
    3,938.65x = 5,435.31 × 2,146.12
  4. Step 4: Simplify right side
    3,938.65x = 11,664,835.72
  5. Step 5: Solve for x
    x = 11,664,835.72/3,938.65
  6. Step 6: Final answer
    x = 2,961.64

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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.