Home / 3,900.32-5,383.96-2,640.76

Finding the Fourth Proportional to 3,900.32, 5,383.96 and 2,640.76

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Solution

The fourth proportional to 3,900.32, 5,383.96 and 2,640.76 is: 3,645.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,900.32 : 5,383.96 = 2,640.76 : x
  2. Step 2: Convert to fraction form
    3,900.32/5,383.96 = 2,640.76/x
  3. Step 3: Cross multiply
    3,900.32x = 5,383.96 × 2,640.76
  4. Step 4: Simplify right side
    3,900.32x = 14,217,746.21
  5. Step 5: Solve for x
    x = 14,217,746.21/3,900.32
  6. Step 6: Final answer
    x = 3,645.28

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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.