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Finding the Fourth Proportional to 8,390, 12,585 and 2,546.48

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Solution

The fourth proportional to 8,390, 12,585 and 2,546.48 is: 3,819.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,390 : 12,585 = 2,546.48 : x
  2. Step 2: Convert to fraction form
    8,390/12,585 = 2,546.48/x
  3. Step 3: Cross multiply
    8,390x = 12,585 × 2,546.48
  4. Step 4: Simplify right side
    8,390x = 32,047,450.80
  5. Step 5: Solve for x
    x = 32,047,450.80/8,390
  6. Step 6: Final answer
    x = 3,819.72

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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.