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Finding the Fourth Proportional to 12,961.62, 17,860.50 and 12,145.14

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Solution

The fourth proportional to 12,961.62, 17,860.50 and 12,145.14 is: 16,735.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,961.62 : 17,860.50 = 12,145.14 : x
  2. Step 2: Convert to fraction form
    12,961.62/17,860.50 = 12,145.14/x
  3. Step 3: Cross multiply
    12,961.62x = 17,860.50 × 12,145.14
  4. Step 4: Simplify right side
    12,961.62x = 216,918,272.97
  5. Step 5: Solve for x
    x = 216,918,272.97/12,961.62
  6. Step 6: Final answer
    x = 16,735.43

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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.