Home / 3,898.97-5,380.58-2,130.57

Finding the Fourth Proportional to 3,898.97, 5,380.58 and 2,130.57

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Solution

The fourth proportional to 3,898.97, 5,380.58 and 2,130.57 is: 2,940.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.97 : 5,380.58 = 2,130.57 : x
  2. Step 2: Convert to fraction form
    3,898.97/5,380.58 = 2,130.57/x
  3. Step 3: Cross multiply
    3,898.97x = 5,380.58 × 2,130.57
  4. Step 4: Simplify right side
    3,898.97x = 11,463,695.67
  5. Step 5: Solve for x
    x = 11,463,695.67/3,898.97
  6. Step 6: Final answer
    x = 2,940.19

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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.