Home / 3,960.78-5,465.80-2,192.39

Finding the Fourth Proportional to 3,960.78, 5,465.80 and 2,192.39

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Solution

The fourth proportional to 3,960.78, 5,465.80 and 2,192.39 is: 3,025.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,960.78 : 5,465.80 = 2,192.39 : x
  2. Step 2: Convert to fraction form
    3,960.78/5,465.80 = 2,192.39/x
  3. Step 3: Cross multiply
    3,960.78x = 5,465.80 × 2,192.39
  4. Step 4: Simplify right side
    3,960.78x = 11,983,173.45
  5. Step 5: Solve for x
    x = 11,983,173.45/3,960.78
  6. Step 6: Final answer
    x = 3,025.46

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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.