Home / 8,985.21-13,469.31-3,138.03

Finding the Fourth Proportional to 8,985.21, 13,469.31 and 3,138.03

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Solution

The fourth proportional to 8,985.21, 13,469.31 and 3,138.03 is: 4,704.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,985.21 : 13,469.31 = 3,138.03 : x
  2. Step 2: Convert to fraction form
    8,985.21/13,469.31 = 3,138.03/x
  3. Step 3: Cross multiply
    8,985.21x = 13,469.31 × 3,138.03
  4. Step 4: Simplify right side
    8,985.21x = 42,267,098.86
  5. Step 5: Solve for x
    x = 42,267,098.86/8,985.21
  6. Step 6: Final answer
    x = 4,704.07

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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.