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Finding the Fourth Proportional to 8,609.15, 12,915.07 and 3,678.82

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Solution

The fourth proportional to 8,609.15, 12,915.07 and 3,678.82 is: 5,518.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,609.15 : 12,915.07 = 3,678.82 : x
  2. Step 2: Convert to fraction form
    8,609.15/12,915.07 = 3,678.82/x
  3. Step 3: Cross multiply
    8,609.15x = 12,915.07 × 3,678.82
  4. Step 4: Simplify right side
    8,609.15x = 47,512,217.82
  5. Step 5: Solve for x
    x = 47,512,217.82/8,609.15
  6. Step 6: Final answer
    x = 5,518.80

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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.