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Finding the Fourth Proportional to 6,723, 9,278.55 and 3,928.50

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Solution

The fourth proportional to 6,723, 9,278.55 and 3,928.50 is: 5,421.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,723 : 9,278.55 = 3,928.50 : x
  2. Step 2: Convert to fraction form
    6,723/9,278.55 = 3,928.50/x
  3. Step 3: Cross multiply
    6,723x = 9,278.55 × 3,928.50
  4. Step 4: Simplify right side
    6,723x = 36,450,783.68
  5. Step 5: Solve for x
    x = 36,450,783.68/6,723
  6. Step 6: Final answer
    x = 5,421.80

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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.