Home / 5,156.30-7,115.25-3,031.90

Finding the Fourth Proportional to 5,156.30, 7,115.25 and 3,031.90

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Solution

The fourth proportional to 5,156.30, 7,115.25 and 3,031.90 is: 4,183.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,156.30 : 7,115.25 = 3,031.90 : x
  2. Step 2: Convert to fraction form
    5,156.30/7,115.25 = 3,031.90/x
  3. Step 3: Cross multiply
    5,156.30x = 7,115.25 × 3,031.90
  4. Step 4: Simplify right side
    5,156.30x = 21,572,726.48
  5. Step 5: Solve for x
    x = 21,572,726.48/5,156.30
  6. Step 6: Final answer
    x = 4,183.76

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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.