Home / 3,140.90-4,335.31-1,961.30

Finding the Fourth Proportional to 3,140.90, 4,335.31 and 1,961.30

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Solution

The fourth proportional to 3,140.90, 4,335.31 and 1,961.30 is: 2,707.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,140.90 : 4,335.31 = 1,961.30 : x
  2. Step 2: Convert to fraction form
    3,140.90/4,335.31 = 1,961.30/x
  3. Step 3: Cross multiply
    3,140.90x = 4,335.31 × 1,961.30
  4. Step 4: Simplify right side
    3,140.90x = 8,502,843.50
  5. Step 5: Solve for x
    x = 8,502,843.50/3,140.90
  6. Step 6: Final answer
    x = 2,707.14

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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.