Home / 5,163.65-7,125.84-2,805.78

Finding the Fourth Proportional to 5,163.65, 7,125.84 and 2,805.78

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Solution

The fourth proportional to 5,163.65, 7,125.84 and 2,805.78 is: 3,871.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,163.65 : 7,125.84 = 2,805.78 : x
  2. Step 2: Convert to fraction form
    5,163.65/7,125.84 = 2,805.78/x
  3. Step 3: Cross multiply
    5,163.65x = 7,125.84 × 2,805.78
  4. Step 4: Simplify right side
    5,163.65x = 19,993,539.36
  5. Step 5: Solve for x
    x = 19,993,539.36/5,163.65
  6. Step 6: Final answer
    x = 3,871.98

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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.