Home / 8,249.28-12,378.72-3,319.36

Finding the Fourth Proportional to 8,249.28, 12,378.72 and 3,319.36

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Solution

The fourth proportional to 8,249.28, 12,378.72 and 3,319.36 is: 4,980.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,249.28 : 12,378.72 = 3,319.36 : x
  2. Step 2: Convert to fraction form
    8,249.28/12,378.72 = 3,319.36/x
  3. Step 3: Cross multiply
    8,249.28x = 12,378.72 × 3,319.36
  4. Step 4: Simplify right side
    8,249.28x = 41,089,428.02
  5. Step 5: Solve for x
    x = 41,089,428.02/8,249.28
  6. Step 6: Final answer
    x = 4,980.97

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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.