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Finding the Fourth Proportional to 8,660.10, 12,991.47 and 3,729.77

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Solution

The fourth proportional to 8,660.10, 12,991.47 and 3,729.77 is: 5,595.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,660.10 : 12,991.47 = 3,729.77 : x
  2. Step 2: Convert to fraction form
    8,660.10/12,991.47 = 3,729.77/x
  3. Step 3: Cross multiply
    8,660.10x = 12,991.47 × 3,729.77
  4. Step 4: Simplify right side
    8,660.10x = 48,455,195.06
  5. Step 5: Solve for x
    x = 48,455,195.06/8,660.10
  6. Step 6: Final answer
    x = 5,595.22

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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.