Home / 7,163.85-9,886.70-3,977.34

Finding the Fourth Proportional to 7,163.85, 9,886.70 and 3,977.34

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Solution

The fourth proportional to 7,163.85, 9,886.70 and 3,977.34 is: 5,489.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,163.85 : 9,886.70 = 3,977.34 : x
  2. Step 2: Convert to fraction form
    7,163.85/9,886.70 = 3,977.34/x
  3. Step 3: Cross multiply
    7,163.85x = 9,886.70 × 3,977.34
  4. Step 4: Simplify right side
    7,163.85x = 39,322,747.49
  5. Step 5: Solve for x
    x = 39,322,747.49/7,163.85
  6. Step 6: Final answer
    x = 5,489.05

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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.