Home / 3,138.48-4,330.70-1,879.30

Finding the Fourth Proportional to 3,138.48, 4,330.70 and 1,879.30

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Solution

The fourth proportional to 3,138.48, 4,330.70 and 1,879.30 is: 2,593.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.48 : 4,330.70 = 1,879.30 : x
  2. Step 2: Convert to fraction form
    3,138.48/4,330.70 = 1,879.30/x
  3. Step 3: Cross multiply
    3,138.48x = 4,330.70 × 1,879.30
  4. Step 4: Simplify right side
    3,138.48x = 8,138,687.57
  5. Step 5: Solve for x
    x = 8,138,687.57/3,138.48
  6. Step 6: Final answer
    x = 2,593.19

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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.