Home / 3,898.83-5,380.53-2,130.54

Finding the Fourth Proportional to 3,898.83, 5,380.53 and 2,130.54

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Solution

The fourth proportional to 3,898.83, 5,380.53 and 2,130.54 is: 2,940.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,898.83 : 5,380.53 = 2,130.54 : x
  2. Step 2: Convert to fraction form
    3,898.83/5,380.53 = 2,130.54/x
  3. Step 3: Cross multiply
    3,898.83x = 5,380.53 × 2,130.54
  4. Step 4: Simplify right side
    3,898.83x = 11,463,434.39
  5. Step 5: Solve for x
    x = 11,463,434.39/3,898.83
  6. Step 6: Final answer
    x = 2,940.22

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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.