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Finding the Fourth Proportional to 9,660.60, 14,490.90 and 8,129.70

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Solution

The fourth proportional to 9,660.60, 14,490.90 and 8,129.70 is: 12,194.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,660.60 : 14,490.90 = 8,129.70 : x
  2. Step 2: Convert to fraction form
    9,660.60/14,490.90 = 8,129.70/x
  3. Step 3: Cross multiply
    9,660.60x = 14,490.90 × 8,129.70
  4. Step 4: Simplify right side
    9,660.60x = 117,806,669.73
  5. Step 5: Solve for x
    x = 117,806,669.73/9,660.60
  6. Step 6: Final answer
    x = 12,194.55

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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.