Home / 5,172.20-7,137.92-2,814.28

Finding the Fourth Proportional to 5,172.20, 7,137.92 and 2,814.28

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Solution

The fourth proportional to 5,172.20, 7,137.92 and 2,814.28 is: 3,883.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.20 : 7,137.92 = 2,814.28 : x
  2. Step 2: Convert to fraction form
    5,172.20/7,137.92 = 2,814.28/x
  3. Step 3: Cross multiply
    5,172.20x = 7,137.92 × 2,814.28
  4. Step 4: Simplify right side
    5,172.20x = 20,088,105.50
  5. Step 5: Solve for x
    x = 20,088,105.50/5,172.20
  6. Step 6: Final answer
    x = 3,883.86

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1.5x scale

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.