Home / 3,781.34-5,216.84-2,789

Finding the Fourth Proportional to 3,781.34, 5,216.84 and 2,789

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Solution

The fourth proportional to 3,781.34, 5,216.84 and 2,789 is: 3,847.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,781.34 : 5,216.84 = 2,789 : x
  2. Step 2: Convert to fraction form
    3,781.34/5,216.84 = 2,789/x
  3. Step 3: Cross multiply
    3,781.34x = 5,216.84 × 2,789
  4. Step 4: Simplify right side
    3,781.34x = 14,549,766.76
  5. Step 5: Solve for x
    x = 14,549,766.76/3,781.34
  6. Step 6: Final answer
    x = 3,847.78

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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.