Home / 3,643.96-5,029.31-2,151.78

Finding the Fourth Proportional to 3,643.96, 5,029.31 and 2,151.78

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Solution

The fourth proportional to 3,643.96, 5,029.31 and 2,151.78 is: 2,969.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,643.96 : 5,029.31 = 2,151.78 : x
  2. Step 2: Convert to fraction form
    3,643.96/5,029.31 = 2,151.78/x
  3. Step 3: Cross multiply
    3,643.96x = 5,029.31 × 2,151.78
  4. Step 4: Simplify right side
    3,643.96x = 10,821,968.67
  5. Step 5: Solve for x
    x = 10,821,968.67/3,643.96
  6. Step 6: Final answer
    x = 2,969.84

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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.