Home / 5,163.60-7,125.69-2,805.72

Finding the Fourth Proportional to 5,163.60, 7,125.69 and 2,805.72

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Solution

The fourth proportional to 5,163.60, 7,125.69 and 2,805.72 is: 3,871.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,163.60 : 7,125.69 = 2,805.72 : x
  2. Step 2: Convert to fraction form
    5,163.60/7,125.69 = 2,805.72/x
  3. Step 3: Cross multiply
    5,163.60x = 7,125.69 × 2,805.72
  4. Step 4: Simplify right side
    5,163.60x = 19,992,690.95
  5. Step 5: Solve for x
    x = 19,992,690.95/5,163.60
  6. Step 6: Final answer
    x = 3,871.85

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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.