Home / 3,920.96-5,410.86-2,152.74

Finding the Fourth Proportional to 3,920.96, 5,410.86 and 2,152.74

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Solution

The fourth proportional to 3,920.96, 5,410.86 and 2,152.74 is: 2,970.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.96 : 5,410.86 = 2,152.74 : x
  2. Step 2: Convert to fraction form
    3,920.96/5,410.86 = 2,152.74/x
  3. Step 3: Cross multiply
    3,920.96x = 5,410.86 × 2,152.74
  4. Step 4: Simplify right side
    3,920.96x = 11,648,174.76
  5. Step 5: Solve for x
    x = 11,648,174.76/3,920.96
  6. Step 6: Final answer
    x = 2,970.75

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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.