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Finding the Fourth Proportional to 12,868, 17,745.66 and 8,395.18

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Solution

The fourth proportional to 12,868, 17,745.66 and 8,395.18 is: 11,577.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,868 : 17,745.66 = 8,395.18 : x
  2. Step 2: Convert to fraction form
    12,868/17,745.66 = 8,395.18/x
  3. Step 3: Cross multiply
    12,868x = 17,745.66 × 8,395.18
  4. Step 4: Simplify right side
    12,868x = 148,978,009.92
  5. Step 5: Solve for x
    x = 148,978,009.92/12,868
  6. Step 6: Final answer
    x = 11,577.40

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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.