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Finding the Fourth Proportional to 12,072.70, 18,109.05 and 8,314.30

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Solution

The fourth proportional to 12,072.70, 18,109.05 and 8,314.30 is: 12,471.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,072.70 : 18,109.05 = 8,314.30 : x
  2. Step 2: Convert to fraction form
    12,072.70/18,109.05 = 8,314.30/x
  3. Step 3: Cross multiply
    12,072.70x = 18,109.05 × 8,314.30
  4. Step 4: Simplify right side
    12,072.70x = 150,564,074.42
  5. Step 5: Solve for x
    x = 150,564,074.42/12,072.70
  6. Step 6: Final answer
    x = 12,471.45

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Similar ratio
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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.