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Finding the Fourth Proportional to 3,859.86, 5,321.02 and 2,531.26

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Solution

The fourth proportional to 3,859.86, 5,321.02 and 2,531.26 is: 3,489.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,859.86 : 5,321.02 = 2,531.26 : x
  2. Step 2: Convert to fraction form
    3,859.86/5,321.02 = 2,531.26/x
  3. Step 3: Cross multiply
    3,859.86x = 5,321.02 × 2,531.26
  4. Step 4: Simplify right side
    3,859.86x = 13,468,885.09
  5. Step 5: Solve for x
    x = 13,468,885.09/3,859.86
  6. Step 6: Final answer
    x = 3,489.48

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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.