Home / 3,923.78-5,415-2,245.37

Finding the Fourth Proportional to 3,923.78, 5,415 and 2,245.37

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Solution

The fourth proportional to 3,923.78, 5,415 and 2,245.37 is: 3,098.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,923.78 : 5,415 = 2,245.37 : x
  2. Step 2: Convert to fraction form
    3,923.78/5,415 = 2,245.37/x
  3. Step 3: Cross multiply
    3,923.78x = 5,415 × 2,245.37
  4. Step 4: Simplify right side
    3,923.78x = 12,158,678.55
  5. Step 5: Solve for x
    x = 12,158,678.55/3,923.78
  6. Step 6: Final answer
    x = 3,098.72

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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.