Home / 3,911.36-5,398.79-2,585.39

Finding the Fourth Proportional to 3,911.36, 5,398.79 and 2,585.39

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Solution

The fourth proportional to 3,911.36, 5,398.79 and 2,585.39 is: 3,568.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.36 : 5,398.79 = 2,585.39 : x
  2. Step 2: Convert to fraction form
    3,911.36/5,398.79 = 2,585.39/x
  3. Step 3: Cross multiply
    3,911.36x = 5,398.79 × 2,585.39
  4. Step 4: Simplify right side
    3,911.36x = 13,957,937.76
  5. Step 5: Solve for x
    x = 13,957,937.76/3,911.36
  6. Step 6: Final answer
    x = 3,568.57

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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.