Home / 5,215.98-7,198.15-2,857.98

Finding the Fourth Proportional to 5,215.98, 7,198.15 and 2,857.98

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Solution

The fourth proportional to 5,215.98, 7,198.15 and 2,857.98 is: 3,944.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.98 : 7,198.15 = 2,857.98 : x
  2. Step 2: Convert to fraction form
    5,215.98/7,198.15 = 2,857.98/x
  3. Step 3: Cross multiply
    5,215.98x = 7,198.15 × 2,857.98
  4. Step 4: Simplify right side
    5,215.98x = 20,572,161.59
  5. Step 5: Solve for x
    x = 20,572,161.59/5,215.98
  6. Step 6: Final answer
    x = 3,944.06

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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.