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Finding the Fourth Proportional to 12,776.88, 19,163.88 and 3,417.87

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Solution

The fourth proportional to 12,776.88, 19,163.88 and 3,417.87 is: 5,126.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,776.88 : 19,163.88 = 3,417.87 : x
  2. Step 2: Convert to fraction form
    12,776.88/19,163.88 = 3,417.87/x
  3. Step 3: Cross multiply
    12,776.88x = 19,163.88 × 3,417.87
  4. Step 4: Simplify right side
    12,776.88x = 65,499,650.54
  5. Step 5: Solve for x
    x = 65,499,650.54/12,776.88
  6. Step 6: Final answer
    x = 5,126.42

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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.