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Finding the Fourth Proportional to 12,999.52, 17,919.12 and 12,299.68

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Solution

The fourth proportional to 12,999.52, 17,919.12 and 12,299.68 is: 16,954.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,999.52 : 17,919.12 = 12,299.68 : x
  2. Step 2: Convert to fraction form
    12,999.52/17,919.12 = 12,299.68/x
  3. Step 3: Cross multiply
    12,999.52x = 17,919.12 × 12,299.68
  4. Step 4: Simplify right side
    12,999.52x = 220,399,441.88
  5. Step 5: Solve for x
    x = 220,399,441.88/12,999.52
  6. Step 6: Final answer
    x = 16,954.43

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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.