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Finding the Fourth Proportional to 14,455.78, 19,949.44 and 8,168.56

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Solution

The fourth proportional to 14,455.78, 19,949.44 and 8,168.56 is: 11,272.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,455.78 : 19,949.44 = 8,168.56 : x
  2. Step 2: Convert to fraction form
    14,455.78/19,949.44 = 8,168.56/x
  3. Step 3: Cross multiply
    14,455.78x = 19,949.44 × 8,168.56
  4. Step 4: Simplify right side
    14,455.78x = 162,958,197.61
  5. Step 5: Solve for x
    x = 162,958,197.61/14,455.78
  6. Step 6: Final answer
    x = 11,272.87

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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.