Home / 3,913.46-5,400.57-2,145.08

Finding the Fourth Proportional to 3,913.46, 5,400.57 and 2,145.08

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Solution

The fourth proportional to 3,913.46, 5,400.57 and 2,145.08 is: 2,960.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.46 : 5,400.57 = 2,145.08 : x
  2. Step 2: Convert to fraction form
    3,913.46/5,400.57 = 2,145.08/x
  3. Step 3: Cross multiply
    3,913.46x = 5,400.57 × 2,145.08
  4. Step 4: Simplify right side
    3,913.46x = 11,584,676.24
  5. Step 5: Solve for x
    x = 11,584,676.24/3,913.46
  6. Step 6: Final answer
    x = 2,960.21

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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.