Home / 5,215.68-7,198.16-2,977.89

Finding the Fourth Proportional to 5,215.68, 7,198.16 and 2,977.89

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Solution

The fourth proportional to 5,215.68, 7,198.16 and 2,977.89 is: 4,109.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,215.68 : 7,198.16 = 2,977.89 : x
  2. Step 2: Convert to fraction form
    5,215.68/7,198.16 = 2,977.89/x
  3. Step 3: Cross multiply
    5,215.68x = 7,198.16 × 2,977.89
  4. Step 4: Simplify right side
    5,215.68x = 21,435,344.09
  5. Step 5: Solve for x
    x = 21,435,344.09/5,215.68
  6. Step 6: Final answer
    x = 4,109.79

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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.