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Finding the Fourth Proportional to 12,425.97, 17,138.88 and 7,118.85

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Solution

The fourth proportional to 12,425.97, 17,138.88 and 7,118.85 is: 9,818.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,425.97 : 17,138.88 = 7,118.85 : x
  2. Step 2: Convert to fraction form
    12,425.97/17,138.88 = 7,118.85/x
  3. Step 3: Cross multiply
    12,425.97x = 17,138.88 × 7,118.85
  4. Step 4: Simplify right side
    12,425.97x = 122,009,115.89
  5. Step 5: Solve for x
    x = 122,009,115.89/12,425.97
  6. Step 6: Final answer
    x = 9,818.88

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.