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Finding the Fourth Proportional to 8,425.88, 12,626.94 and 3,978.80

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Solution

The fourth proportional to 8,425.88, 12,626.94 and 3,978.80 is: 5,962.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,425.88 : 12,626.94 = 3,978.80 : x
  2. Step 2: Convert to fraction form
    8,425.88/12,626.94 = 3,978.80/x
  3. Step 3: Cross multiply
    8,425.88x = 12,626.94 × 3,978.80
  4. Step 4: Simplify right side
    8,425.88x = 50,240,068.87
  5. Step 5: Solve for x
    x = 50,240,068.87/8,425.88
  6. Step 6: Final answer
    x = 5,962.59

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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.