Home / 3,913.74-5,400.95-2,145.34

Finding the Fourth Proportional to 3,913.74, 5,400.95 and 2,145.34

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Solution

The fourth proportional to 3,913.74, 5,400.95 and 2,145.34 is: 2,960.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,913.74 : 5,400.95 = 2,145.34 : x
  2. Step 2: Convert to fraction form
    3,913.74/5,400.95 = 2,145.34/x
  3. Step 3: Cross multiply
    3,913.74x = 5,400.95 × 2,145.34
  4. Step 4: Simplify right side
    3,913.74x = 11,586,874.07
  5. Step 5: Solve for x
    x = 11,586,874.07/3,913.74
  6. Step 6: Final answer
    x = 2,960.56

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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.