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Finding the Fourth Proportional to 9,069.75, 12,509.87 and 8,764.92

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Solution

The fourth proportional to 9,069.75, 12,509.87 and 8,764.92 is: 12,089.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,069.75 : 12,509.87 = 8,764.92 : x
  2. Step 2: Convert to fraction form
    9,069.75/12,509.87 = 8,764.92/x
  3. Step 3: Cross multiply
    9,069.75x = 12,509.87 × 8,764.92
  4. Step 4: Simplify right side
    9,069.75x = 109,647,965.94
  5. Step 5: Solve for x
    x = 109,647,965.94/9,069.75
  6. Step 6: Final answer
    x = 12,089.41

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Double scale
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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.