Home / 12,745.22-19,117.82-3,980.88

Finding the Fourth Proportional to 12,745.22, 19,117.82 and 3,980.88

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Solution

The fourth proportional to 12,745.22, 19,117.82 and 3,980.88 is: 5,971.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,745.22 : 19,117.82 = 3,980.88 : x
  2. Step 2: Convert to fraction form
    12,745.22/19,117.82 = 3,980.88/x
  3. Step 3: Cross multiply
    12,745.22x = 19,117.82 × 3,980.88
  4. Step 4: Simplify right side
    12,745.22x = 76,105,757.23
  5. Step 5: Solve for x
    x = 76,105,757.23/12,745.22
  6. Step 6: Final answer
    x = 5,971.32

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1.5x scale

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.