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Finding the Fourth Proportional to 12,489.88, 17,230.62 and 7,519

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Solution

The fourth proportional to 12,489.88, 17,230.62 and 7,519 is: 10,372.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,489.88 : 17,230.62 = 7,519 : x
  2. Step 2: Convert to fraction form
    12,489.88/17,230.62 = 7,519/x
  3. Step 3: Cross multiply
    12,489.88x = 17,230.62 × 7,519
  4. Step 4: Simplify right side
    12,489.88x = 129,557,031.78
  5. Step 5: Solve for x
    x = 129,557,031.78/12,489.88
  6. Step 6: Final answer
    x = 10,372.96

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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.