Home / 3,910.76-5,396.91-2,142.53

Finding the Fourth Proportional to 3,910.76, 5,396.91 and 2,142.53

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Solution

The fourth proportional to 3,910.76, 5,396.91 and 2,142.53 is: 2,956.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,910.76 : 5,396.91 = 2,142.53 : x
  2. Step 2: Convert to fraction form
    3,910.76/5,396.91 = 2,142.53/x
  3. Step 3: Cross multiply
    3,910.76x = 5,396.91 × 2,142.53
  4. Step 4: Simplify right side
    3,910.76x = 11,563,041.58
  5. Step 5: Solve for x
    x = 11,563,041.58/3,910.76
  6. Step 6: Final answer
    x = 2,956.72

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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.