Home / 3,847.78-5,309.93-2,079.38

Finding the Fourth Proportional to 3,847.78, 5,309.93 and 2,079.38

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Solution

The fourth proportional to 3,847.78, 5,309.93 and 2,079.38 is: 2,869.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,847.78 : 5,309.93 = 2,079.38 : x
  2. Step 2: Convert to fraction form
    3,847.78/5,309.93 = 2,079.38/x
  3. Step 3: Cross multiply
    3,847.78x = 5,309.93 × 2,079.38
  4. Step 4: Simplify right side
    3,847.78x = 11,041,378.87
  5. Step 5: Solve for x
    x = 11,041,378.87/3,847.78
  6. Step 6: Final answer
    x = 2,869.55

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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.