Home / 5,172.12-7,137.52-2,814.21

Finding the Fourth Proportional to 5,172.12, 7,137.52 and 2,814.21

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Solution

The fourth proportional to 5,172.12, 7,137.52 and 2,814.21 is: 3,883.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,172.12 : 7,137.52 = 2,814.21 : x
  2. Step 2: Convert to fraction form
    5,172.12/7,137.52 = 2,814.21/x
  3. Step 3: Cross multiply
    5,172.12x = 7,137.52 × 2,814.21
  4. Step 4: Simplify right side
    5,172.12x = 20,086,473.12
  5. Step 5: Solve for x
    x = 20,086,473.12/5,172.12
  6. Step 6: Final answer
    x = 3,883.61

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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.