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Finding the Fourth Proportional to 8,656.85, 12,977.48 and 3,108.89

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Solution

The fourth proportional to 8,656.85, 12,977.48 and 3,108.89 is: 4,660.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,656.85 : 12,977.48 = 3,108.89 : x
  2. Step 2: Convert to fraction form
    8,656.85/12,977.48 = 3,108.89/x
  3. Step 3: Cross multiply
    8,656.85x = 12,977.48 × 3,108.89
  4. Step 4: Simplify right side
    8,656.85x = 40,345,477.37
  5. Step 5: Solve for x
    x = 40,345,477.37/8,656.85
  6. Step 6: Final answer
    x = 4,660.53

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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.