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Finding the Fourth Proportional to 3,911.31, 5,869.91 and 3,031.66

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Solution

The fourth proportional to 3,911.31, 5,869.91 and 3,031.66 is: 4,549.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,911.31 : 5,869.91 = 3,031.66 : x
  2. Step 2: Convert to fraction form
    3,911.31/5,869.91 = 3,031.66/x
  3. Step 3: Cross multiply
    3,911.31x = 5,869.91 × 3,031.66
  4. Step 4: Simplify right side
    3,911.31x = 17,795,571.35
  5. Step 5: Solve for x
    x = 17,795,571.35/3,911.31
  6. Step 6: Final answer
    x = 4,549.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.