Home / 3,917.38-5,407.20-2,520.13

Finding the Fourth Proportional to 3,917.38, 5,407.20 and 2,520.13

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Solution

The fourth proportional to 3,917.38, 5,407.20 and 2,520.13 is: 3,478.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,917.38 : 5,407.20 = 2,520.13 : x
  2. Step 2: Convert to fraction form
    3,917.38/5,407.20 = 2,520.13/x
  3. Step 3: Cross multiply
    3,917.38x = 5,407.20 × 2,520.13
  4. Step 4: Simplify right side
    3,917.38x = 13,626,807.30
  5. Step 5: Solve for x
    x = 13,626,807.30/3,917.38
  6. Step 6: Final answer
    x = 3,478.56

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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.