Home / 3,921.16-5,411.34-2,152.81

Finding the Fourth Proportional to 3,921.16, 5,411.34 and 2,152.81

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Solution

The fourth proportional to 3,921.16, 5,411.34 and 2,152.81 is: 2,970.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.16 : 5,411.34 = 2,152.81 : x
  2. Step 2: Convert to fraction form
    3,921.16/5,411.34 = 2,152.81/x
  3. Step 3: Cross multiply
    3,921.16x = 5,411.34 × 2,152.81
  4. Step 4: Simplify right side
    3,921.16x = 11,649,586.87
  5. Step 5: Solve for x
    x = 11,649,586.87/3,921.16
  6. Step 6: Final answer
    x = 2,970.95

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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.