Home / 3,921.42-5,411.26-2,152.74

Finding the Fourth Proportional to 3,921.42, 5,411.26 and 2,152.74

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Solution

The fourth proportional to 3,921.42, 5,411.26 and 2,152.74 is: 2,970.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.42 : 5,411.26 = 2,152.74 : x
  2. Step 2: Convert to fraction form
    3,921.42/5,411.26 = 2,152.74/x
  3. Step 3: Cross multiply
    3,921.42x = 5,411.26 × 2,152.74
  4. Step 4: Simplify right side
    3,921.42x = 11,649,035.85
  5. Step 5: Solve for x
    x = 11,649,035.85/3,921.42
  6. Step 6: Final answer
    x = 2,970.62

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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.