Home / 3,765.75-5,191.31-2,643.21

Finding the Fourth Proportional to 3,765.75, 5,191.31 and 2,643.21

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Solution

The fourth proportional to 3,765.75, 5,191.31 and 2,643.21 is: 3,643.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,765.75 : 5,191.31 = 2,643.21 : x
  2. Step 2: Convert to fraction form
    3,765.75/5,191.31 = 2,643.21/x
  3. Step 3: Cross multiply
    3,765.75x = 5,191.31 × 2,643.21
  4. Step 4: Simplify right side
    3,765.75x = 13,721,709.29
  5. Step 5: Solve for x
    x = 13,721,709.29/3,765.75
  6. Step 6: Final answer
    x = 3,643.82

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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.