Home / 3,971.40-5,490.09-3,031.80

Finding the Fourth Proportional to 3,971.40, 5,490.09 and 3,031.80

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Solution

The fourth proportional to 3,971.40, 5,490.09 and 3,031.80 is: 4,191.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,971.40 : 5,490.09 = 3,031.80 : x
  2. Step 2: Convert to fraction form
    3,971.40/5,490.09 = 3,031.80/x
  3. Step 3: Cross multiply
    3,971.40x = 5,490.09 × 3,031.80
  4. Step 4: Simplify right side
    3,971.40x = 16,644,854.86
  5. Step 5: Solve for x
    x = 16,644,854.86/3,971.40
  6. Step 6: Final answer
    x = 4,191.18

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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.