Home / 3,929.11-5,388.95-3,486.24

Finding the Fourth Proportional to 3,929.11, 5,388.95 and 3,486.24

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Solution

The fourth proportional to 3,929.11, 5,388.95 and 3,486.24 is: 4,781.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,929.11 : 5,388.95 = 3,486.24 : x
  2. Step 2: Convert to fraction form
    3,929.11/5,388.95 = 3,486.24/x
  3. Step 3: Cross multiply
    3,929.11x = 5,388.95 × 3,486.24
  4. Step 4: Simplify right side
    3,929.11x = 18,787,142.14
  5. Step 5: Solve for x
    x = 18,787,142.14/3,929.11
  6. Step 6: Final answer
    x = 4,781.53

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.