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Finding the Fourth Proportional to 12,624.60, 18,915.30 and 8,002.20

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Solution

The fourth proportional to 12,624.60, 18,915.30 and 8,002.20 is: 11,989.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,624.60 : 18,915.30 = 8,002.20 : x
  2. Step 2: Convert to fraction form
    12,624.60/18,915.30 = 8,002.20/x
  3. Step 3: Cross multiply
    12,624.60x = 18,915.30 × 8,002.20
  4. Step 4: Simplify right side
    12,624.60x = 151,364,013.66
  5. Step 5: Solve for x
    x = 151,364,013.66/12,624.60
  6. Step 6: Final answer
    x = 11,989.61

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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.