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Finding the Fourth Proportional to 12,609.14, 18,915.69 and 4,290.14

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Solution

The fourth proportional to 12,609.14, 18,915.69 and 4,290.14 is: 6,435.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,609.14 : 18,915.69 = 4,290.14 : x
  2. Step 2: Convert to fraction form
    12,609.14/18,915.69 = 4,290.14/x
  3. Step 3: Cross multiply
    12,609.14x = 18,915.69 × 4,290.14
  4. Step 4: Simplify right side
    12,609.14x = 81,150,958.30
  5. Step 5: Solve for x
    x = 81,150,958.30/12,609.14
  6. Step 6: Final answer
    x = 6,435.88

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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.