Home / 12,643.24-18,966.78-4,091.83

Finding the Fourth Proportional to 12,643.24, 18,966.78 and 4,091.83

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Solution

The fourth proportional to 12,643.24, 18,966.78 and 4,091.83 is: 6,138.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,643.24 : 18,966.78 = 4,091.83 : x
  2. Step 2: Convert to fraction form
    12,643.24/18,966.78 = 4,091.83/x
  3. Step 3: Cross multiply
    12,643.24x = 18,966.78 × 4,091.83
  4. Step 4: Simplify right side
    12,643.24x = 77,608,839.41
  5. Step 5: Solve for x
    x = 77,608,839.41/12,643.24
  6. Step 6: Final answer
    x = 6,138.37

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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.