Home / 12,741.75-19,103.90-6,489.66

Finding the Fourth Proportional to 12,741.75, 19,103.90 and 6,489.66

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Solution

The fourth proportional to 12,741.75, 19,103.90 and 6,489.66 is: 9,730.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,741.75 : 19,103.90 = 6,489.66 : x
  2. Step 2: Convert to fraction form
    12,741.75/19,103.90 = 6,489.66/x
  3. Step 3: Cross multiply
    12,741.75x = 19,103.90 × 6,489.66
  4. Step 4: Simplify right side
    12,741.75x = 123,977,815.67
  5. Step 5: Solve for x
    x = 123,977,815.67/12,741.75
  6. Step 6: Final answer
    x = 9,730.05

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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.