Home / 3,940.16-5,439.68-2,615.68

Finding the Fourth Proportional to 3,940.16, 5,439.68 and 2,615.68

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Solution

The fourth proportional to 3,940.16, 5,439.68 and 2,615.68 is: 3,611.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,940.16 : 5,439.68 = 2,615.68 : x
  2. Step 2: Convert to fraction form
    3,940.16/5,439.68 = 2,615.68/x
  3. Step 3: Cross multiply
    3,940.16x = 5,439.68 × 2,615.68
  4. Step 4: Simplify right side
    3,940.16x = 14,228,462.18
  5. Step 5: Solve for x
    x = 14,228,462.18/3,940.16
  6. Step 6: Final answer
    x = 3,611.14

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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.