Home / 5,145.20-7,717.80-2,553.20

Finding the Fourth Proportional to 5,145.20, 7,717.80 and 2,553.20

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Solution

The fourth proportional to 5,145.20, 7,717.80 and 2,553.20 is: 3,829.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.20 : 7,717.80 = 2,553.20 : x
  2. Step 2: Convert to fraction form
    5,145.20/7,717.80 = 2,553.20/x
  3. Step 3: Cross multiply
    5,145.20x = 7,717.80 × 2,553.20
  4. Step 4: Simplify right side
    5,145.20x = 19,705,086.96
  5. Step 5: Solve for x
    x = 19,705,086.96/5,145.20
  6. Step 6: Final answer
    x = 3,829.80

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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.