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Finding the Fourth Proportional to 8,739.85, 12,069.56 and 7,473.59

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Solution

The fourth proportional to 8,739.85, 12,069.56 and 7,473.59 is: 10,320.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,739.85 : 12,069.56 = 7,473.59 : x
  2. Step 2: Convert to fraction form
    8,739.85/12,069.56 = 7,473.59/x
  3. Step 3: Cross multiply
    8,739.85x = 12,069.56 × 7,473.59
  4. Step 4: Simplify right side
    8,739.85x = 90,202,942.92
  5. Step 5: Solve for x
    x = 90,202,942.92/8,739.85
  6. Step 6: Final answer
    x = 10,320.88

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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.