Home / 3,987.55-5,979.70-1,795.69

Finding the Fourth Proportional to 3,987.55, 5,979.70 and 1,795.69

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Solution

The fourth proportional to 3,987.55, 5,979.70 and 1,795.69 is: 2,692.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,987.55 : 5,979.70 = 1,795.69 : x
  2. Step 2: Convert to fraction form
    3,987.55/5,979.70 = 1,795.69/x
  3. Step 3: Cross multiply
    3,987.55x = 5,979.70 × 1,795.69
  4. Step 4: Simplify right side
    3,987.55x = 10,737,687.49
  5. Step 5: Solve for x
    x = 10,737,687.49/3,987.55
  6. Step 6: Final answer
    x = 2,692.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.