Home / 3,921.06-5,411.10-2,152.68

Finding the Fourth Proportional to 3,921.06, 5,411.10 and 2,152.68

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Solution

The fourth proportional to 3,921.06, 5,411.10 and 2,152.68 is: 2,970.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,921.06 : 5,411.10 = 2,152.68 : x
  2. Step 2: Convert to fraction form
    3,921.06/5,411.10 = 2,152.68/x
  3. Step 3: Cross multiply
    3,921.06x = 5,411.10 × 2,152.68
  4. Step 4: Simplify right side
    3,921.06x = 11,648,366.75
  5. Step 5: Solve for x
    x = 11,648,366.75/3,921.06
  6. Step 6: Final answer
    x = 2,970.72

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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.