Home / 3,920.01-5,407.68-2,856.12

Finding the Fourth Proportional to 3,920.01, 5,407.68 and 2,856.12

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Solution

The fourth proportional to 3,920.01, 5,407.68 and 2,856.12 is: 3,940.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.01 : 5,407.68 = 2,856.12 : x
  2. Step 2: Convert to fraction form
    3,920.01/5,407.68 = 2,856.12/x
  3. Step 3: Cross multiply
    3,920.01x = 5,407.68 × 2,856.12
  4. Step 4: Simplify right side
    3,920.01x = 15,444,983.00
  5. Step 5: Solve for x
    x = 15,444,983.00/3,920.01
  6. Step 6: Final answer
    x = 3,940.04

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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.