Home / 2,629.62-3,634.10-2,156.78

Finding the Fourth Proportional to 2,629.62, 3,634.10 and 2,156.78

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Solution

The fourth proportional to 2,629.62, 3,634.10 and 2,156.78 is: 2,980.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,629.62 : 3,634.10 = 2,156.78 : x
  2. Step 2: Convert to fraction form
    2,629.62/3,634.10 = 2,156.78/x
  3. Step 3: Cross multiply
    2,629.62x = 3,634.10 × 2,156.78
  4. Step 4: Simplify right side
    2,629.62x = 7,837,954.20
  5. Step 5: Solve for x
    x = 7,837,954.20/2,629.62
  6. Step 6: Final answer
    x = 2,980.64

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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.