Home / 3,138.72-4,331.22-1,813.32

Finding the Fourth Proportional to 3,138.72, 4,331.22 and 1,813.32

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Solution

The fourth proportional to 3,138.72, 4,331.22 and 1,813.32 is: 2,502.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,138.72 : 4,331.22 = 1,813.32 : x
  2. Step 2: Convert to fraction form
    3,138.72/4,331.22 = 1,813.32/x
  3. Step 3: Cross multiply
    3,138.72x = 4,331.22 × 1,813.32
  4. Step 4: Simplify right side
    3,138.72x = 7,853,887.85
  5. Step 5: Solve for x
    x = 7,853,887.85/3,138.72
  6. Step 6: Final answer
    x = 2,502.26

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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.