Home / 5,129.12-7,686.30-3,180.20

Finding the Fourth Proportional to 5,129.12, 7,686.30 and 3,180.20

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Solution

The fourth proportional to 5,129.12, 7,686.30 and 3,180.20 is: 4,765.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,129.12 : 7,686.30 = 3,180.20 : x
  2. Step 2: Convert to fraction form
    5,129.12/7,686.30 = 3,180.20/x
  3. Step 3: Cross multiply
    5,129.12x = 7,686.30 × 3,180.20
  4. Step 4: Simplify right side
    5,129.12x = 24,443,971.26
  5. Step 5: Solve for x
    x = 24,443,971.26/5,129.12
  6. Step 6: Final answer
    x = 4,765.72

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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.