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Finding the Fourth Proportional to 12,855.99, 19,257.15 and 10,343.64

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Solution

The fourth proportional to 12,855.99, 19,257.15 and 10,343.64 is: 15,493.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,855.99 : 19,257.15 = 10,343.64 : x
  2. Step 2: Convert to fraction form
    12,855.99/19,257.15 = 10,343.64/x
  3. Step 3: Cross multiply
    12,855.99x = 19,257.15 × 10,343.64
  4. Step 4: Simplify right side
    12,855.99x = 199,189,027.03
  5. Step 5: Solve for x
    x = 199,189,027.03/12,855.99
  6. Step 6: Final answer
    x = 15,493.87

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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.