Home / 3,921.13-5,411.28-2,152.87

Finding the Fourth Proportional to 3,921.13, 5,411.28 and 2,152.87

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Solution

The fourth proportional to 3,921.13, 5,411.28 and 2,152.87 is: 2,971.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.13 : 5,411.28 = 2,152.87 : x
  2. Step 2: Convert to fraction form
    3,921.13/5,411.28 = 2,152.87/x
  3. Step 3: Cross multiply
    3,921.13x = 5,411.28 × 2,152.87
  4. Step 4: Simplify right side
    3,921.13x = 11,649,782.37
  5. Step 5: Solve for x
    x = 11,649,782.37/3,921.13
  6. Step 6: Final answer
    x = 2,971.03

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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.