Home / 5,319.14-7,346.87-3,900.78

Finding the Fourth Proportional to 5,319.14, 7,346.87 and 3,900.78

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Solution

The fourth proportional to 5,319.14, 7,346.87 and 3,900.78 is: 5,387.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,319.14 : 7,346.87 = 3,900.78 : x
  2. Step 2: Convert to fraction form
    5,319.14/7,346.87 = 3,900.78/x
  3. Step 3: Cross multiply
    5,319.14x = 7,346.87 × 3,900.78
  4. Step 4: Simplify right side
    5,319.14x = 28,658,523.56
  5. Step 5: Solve for x
    x = 28,658,523.56/5,319.14
  6. Step 6: Final answer
    x = 5,387.81

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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.