Home / 7,346.98-10,138.84-3,989.78

Finding the Fourth Proportional to 7,346.98, 10,138.84 and 3,989.78

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Solution

The fourth proportional to 7,346.98, 10,138.84 and 3,989.78 is: 5,505.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,346.98 : 10,138.84 = 3,989.78 : x
  2. Step 2: Convert to fraction form
    7,346.98/10,138.84 = 3,989.78/x
  3. Step 3: Cross multiply
    7,346.98x = 10,138.84 × 3,989.78
  4. Step 4: Simplify right side
    7,346.98x = 40,451,775.44
  5. Step 5: Solve for x
    x = 40,451,775.44/7,346.98
  6. Step 6: Final answer
    x = 5,505.90

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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.